I bought a Willem PCB3 from eBay for about 15 quid,
which came with all
the cables and even a free 27C512 (which now holds custom firmware for
one of my synths). The only downside is that the only software I've
seen so far is Windows-only, and I can't find any proper documentation
for it.
Custom synths?!? Tell me more about that :oD
The software runs perfectly well under Wine, otherwise
it would have
gone back.
There are sources for an old version of this program, I can send you if
you want, but you can find everything under
www.willem.org :o)