Well, I just got back from my EV build day. Tom, who knows way more about electronics than me, suggested something like these:
Vicor 12 to 15 VDC DC-DC Converter (VI-202-CX) - eBay (item 290320157563 end time Jun-25-09 23:23:29 PDT)
In 5-40V Out 12-50V Adjustable DC-DC Step-up Converter - eBay (item 160341756546 end time Jul-12-09 20:19:41 PDT)
DC to DC Converter NEW Wall 9-25 DCV In 12 VDC Out 5A - eBay (item 190315599555 end time Jul-18-09 16:00:43 PDT)
He mentioned if it was necessary, you could always run more than 1. He of course said you could make your own custom unit too if you want to.
So, first we need to get some idea of how many amps we need to power the ignition coil and fuel pump. I plan on looking over the wiring diagrams for my car this coming week and do some amperage testing.