Hi Jason, try these guys:
http://www.synthesizerservice.de/index.php?lang=en
They are the hardware branch for Access-Music. Helpful guys.
Or you could buy an Indigo that is beyond repair, for cannibalising for spare parts (the keybed itself is one, all-in-one unit).
Best,
Tim
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PS > And another thing! Will the Ti|3 have user customisable/importable wavetables?
A ribbon-controller or XY-Pad might be nice, too, please! Thanks!