I've been using Primal Custom for 4 years now for Team Navy's RAGBRAI jerseys. You can see them at the link below. Their min order is 15, though, up form 12 last year. You might be able to talk them into doing 13 for you; they've been pretty good to work with for me. The jerseys run $60 with unlimited colors and/or full picture graphics. Quality is outstanding!
We've been very satisfied with the jerseys, artwork and print outcome to the point that I don't even look at other companies now when getting my order ready.