I don't know of anything but this question reminds me of an article I ready some years back (I think in Keyboard Magazine). Apparently somebody was experimenting with a keyboard design that uses solenoids to emulate different keyboard "feels". I found what appear to be a couple of related articles:

http://pe.org.pl/articles/2013/2b/17.pdf

http://www.google.ca/patents/US6121535

I may have read the same article, it was a while ago and from time to time I reflect on why nothing seems to have come to market.
In re-reading the Horvath paper....   For some ODD reason it reminded me that the "horseless carriage" wasn't developed with rein & whip controls for steering & accelerator
The foot brake made it through, but little else.
{Voice commands might come back, quite soon in fact, but probably not exactly the same words, e.g. Whoa, Gee, walk on.}

A crazy thought perhaps, but there may be a case for NOT trying to emulate previous interfaces too closely.
For example I see little point in ME developing the touch required of a concert pianist on a 9 ft grand when playing some virtuosic piece.

I found a link to a company in Canada, Classic MIDI Works, that has such a product, which they sell as an organ console component...

If you can find one of these and try it out, let us know if it is suitable.

I use these keyboards for my digital Organ.  They work outstandingly well for digital Harpsichord as well.

A single stand-alone keyboard would work just fine, and is "ready to use", but it looks unfinished without its frame ("key cheeks").  The frames they sell are designed for stacks of at least two keyboards, so for a single keyboard you could either choose to ignore the unfinished appearance, or design some simple frame on your own.

The keyboard itself I can highly recommend for use with digital harpsichords or organs.  It is velocity sensitive, so can also be used for a digital piano, but the feel is of course highly atypical for this application.

http://www.fatar.com/Pages/TP_8L.htm

There are kit organ console companies that sell the other components you would need to assemble a functioning MIDI controller from the Fatar mechanism.

I found a link to a company in Canada, Classic MIDI Works, that has such a product, which they sell as an organ console component; you can buy one 61-key manual for US $525. It is designed to fit into an organ console, but perhaps they could modify it to make a stand-alone single-manual keyboard controller in a case, or you could build one yourself.

http://www.us.midiworks.ca/index.php?op...uct_id=140

If you can find one of these and try it out, let us know if it is suitable.

http://pe.org.pl/articles/2013/2b/17.pdf

http://www.google.ca/patents/US6121535

http://www.forum-pianoteq.com/viewtopic.php?id=3614
and
http://www.pianoworld.com/forum/ubbthre...ost2349423

To say the least, my search has failed.

So, I have come up with a new idea. There are a lot of very light, inexpensive, synth- or semi-weighted, 61-key controllers on the market. I see a lot of posts here about the best controller for piano sounds, but what about a suitable (realistic?) controller for emulating the action of a harpsichord or clavichord? Two completely different actions and mechanisms, I know—but what would come close? I have never played either.

While I could continue to play the pianos with a semi-weighted controller, the idea of devoting myself to the Pianoteq harpsichords and clavichord while traveling, using a cheaper 61-key controller without fully weighted keys, is becoming more and more appealing (albeit in a fanciful, romanticized way…).

Does anyone use a devoted controller for the harpsichords or clavichord? What would be a good option?