well you are looking for the custom silk screen printing on shirts and i would suggest you Design2Express provides services regarding your demand you could also find free graphic designing consultation for the shirts you are planning to do.they provide custom quotes for every order and free shipping to the doorstep too.
Here's a few, I don't know what style it is your looking for in the cable knit sweater and your price range but heres some links I found:
Knit-Sweater-Cardigan-4-Colors.html (This ones my favorite)
HOPE I HELPED!! (: