How many pieces do you think that you'll want to make? There are quite a few places out there that will make custom kit for you. Most of them have some minimums for your order, but they tend to work it in different ways. Some do it by the piece, so if you order jerseys and vests you have to have at least 5 jerseys and 5 vests. Some do it by type of piece (bottoms, tops, etc), so you have to order 5, but you could say get 3 jerseys and 2 vests.

Champion is pretty liberal about minimums and I've heard their stuff is nice
http://www.champ-sys.com/pages/index.html - but there are others other there, so shop around

We use Canari on our team - I love their stuff, its really sewn to fit women! www.canari.com
My husbands team uses Capo Forma www.uplandsg.com/capoforma
Lots of teams like Voler www.voler.com
and it seems like there are dozens of smaller companies out there these days - pick up a cycling magazine (like Bicycling) and you'll see lots of ads or search the web

Most of the bigger places at least, will have templates to download for designing - I think the one I looked at was made for Adobe Illustrator

If you just want to do one of two pieces I think I've heard about copy centers having some type of either sublimation or iron on material that will work on jerseys.