I am finding from people overseas (DE & GB) that these parts are pretty much non-existent, and when available are very expensive. The 2 most recent sales were for 15,000 pounds, and 11,000 Euros for the pump, slide throttle, trumpets, and drives.
They work very well, if setup properly, and produce prodigious amounts of power, typically 350-360 HP out of a 3.5 ltr, 2 valve engine.
Thanks to those who offered leads. I plan to track each one, but I may need to resign myself to Webers. The rules for most vintage groups specify 'period correct' parts, so the idea of putting an M88 engine with electronic FI won't pass muster. Too bad, it would be cheaper, more reliable, and develop more power.
Steve