I'm now documenting a few DIY modular synth projects over at musicthing.co.uk/modular/ including this random sequencer, inspired by vintage and modern random sequencers like the Triadex Muse, Don Buchla's 266 Source of Uncertainty module and Grant Richter's Wiard Noise Ring.
I'm not manufacturing or selling modules, kits, or PCBs, but the design files are all Creative Commons licensed, so you can get PCBs by emailing one file to China, components from a company like Mouser, and laser cut acrylic front panels from anywhere that such things are made. Full how-to details are here: Finding parts to build the random sequencer.
