Did you leave an email?
Did you leave a "contact us" email at the Zektor web site? Zonn will answer those, and let you know if he has any extra boards lying around.
The only other way to get one would be to post in the Wanted to Buy section of the forums here. They sold new last year for $199, and the cables were $20 (IIRC). I think you'd have to offer at least that much.
For now, you still need DOS to have a PC talk to the ZVG (the SDK uses direct hardware access to the parallel port). A windows SDK is possible though, just nobody has ported it yet.