I just bought a NOS Bowens 1000DX so I'm not looking any more - unless this seller rips me off too, but they look reasonable (good feedback on sales of multiple $2000+ bits of optics). It ought to be a bit more reliable, though it destroyed my bank balance.

Discoman: I still have what looks like a working power stage from the SQ-600 (it was charging and firing OK) but no controller for it (that bit was kind of burning while powered on so got sent back). It has a commonly-available plug on it with most pins labelled on the PCB so I think I might ask the manufacturer for a service manual or something and figure out how to make my own controller for it, even if it only lets me fire at full power.