How big a hurry are you in, and are you looking for hardwood/wicker or just tolex?
I'm planning to build a Bubinga/wicker (full combo cabinet) for my Studio Series. The only hold-up at this point is making the decision to purchase the additional woodworking equipment I would need to do it properly.
In other words, it may be a few months before I'm fully set up and have the process worked out from building my own cabinets, but if you're interested in a hardwood/wicker head cabinet, I might be able to do it for you when that time comes (if you like what I did on my own cabinets).
Until then, you can check out the guys who are already making amplifier cabinets. There are 2 that I'm thinking of who do nice work, but I can't remember the names right now. If you do a search on this forum, you are likely to find discussions and links to those sites.
(Edit): I see someone already posted one of the links above.