Hi Laz,
Good to hear from you, I saw your big sell off and wondered what the driving reason behind it was...
As for Carbon fiber there's a Firm in Blackpool (I think) that specialize in Composit Kevlar and fiberglass supply, you may find them with a google search.
If you get no joy I can get you the firms name on Tuesday, I heard about them via the Sidecar people here who use them to supply the raw material for fairings and undertrays.
May I also be the first to wish you my congratulations in deciding to go ahead with your project.
Could i also suggest making some scale models first to test your air resistance theory's, as a rule its usually easier to quantify early designs by checking the results for scale models.
John