Real simple solution here, buy the 66cm frame from cannondale and buy an aftermarket fork because you will probably need the full steerer length or close to it. then buy any bike from bikes direct. there are $100 bikes with full ultegra. Take all the parts off the bikes direct bike and transfer them onto your cannondale frame. Problem solved.

Lets face it, you need something pretty custom, there just aren't going to be that many frames mass produced in those sizes, they won't sell enough of them. your pretty much going to have to build from scratch but it's not as hard or as expensive as you think.