Don't know if they have exactly what you're looking for, but Louis Garneau did some custom jerseys for me at prices that I could at least make a little money on when sold to my client. Most custom jobs are offered direct to the cycling teams at a retail price, and the manufacturers don't offer wholesale pricing to decorators.
LG has a custom division and some stock designs. Check them out:
Suzi Dix
Custom Sales Supervisor
Phone: 802.334.5885 #253 | 1.800.448.1984
Fax: 802.334.6425 | 1.800.448.1985 sdix@louisgarneau.us
Louis Garneau USA Inc.
1352 East Main Street, Box 755
Newport, VT 05855
http://www.louisgarneau.com
Are you doing a total custom jersey? Most are sublimated before even sewing. Maybe you know all that; I had to get educated!
Brian