"Some of the best compact synthesizer modules on the planet!" boasts the home page of Blacet Electronics. They offer high quality compact analog modular synthesizers in kit and fully assembled designs. As of Spring 2010 they have several new modules including a new reverb and envelope generator. They are adamant about holding the claim to be the only company offering voltage controlled synths in kit and assembled. Again hone your DIY skills and have peace of mind in your synth.
A good place to start building with the Classic Rack shown above.
Blacet electronics For Music research also has an active discussion forum about all their synths as well as discussions on other synths from Buchla, EMS, and more. Modules and kits can be ordered directly from their website http://www.blacet.com/