My son has just started a 2 yr course at our local senior secondary school, where they build and race c/f recumbents in a energy challenge comp, (They have won it a number of times against nationwide competitors). The first year involves making a prototype from steel then testing it till they've perfected it, then year two moves on to making it in c/f.
My son is considering as a project in his second year of making a c/f R20 type frame with some nice upgrades, of course....like a rear end that will take a 9 speed hub, provision for rear and front derailliuers and bidon holders, slighty longer top bar, c/f forks, better brake bridge for road callipers etc etc.
The school has even in the past made c/f rims, so that's not out of the question, and I think most of the cost might be covered by them.....so all we have to do is work out what components we want..I'm thinkin' 9 speed STI Ultegra or c/f Durace set up with 60/50 chainrings and 451 rims.
Time will tell if this actually happens, but stranger things have, so stay tuned.......