Help: Looking to get shirts made with my own pattern. (Philadelphia)

I've been having a lot of trouble finding a place to get shirts made. I'm looking to get sizes made (S,M,L) rather then a custom fit. I can't seem to find a sewing contractor, or tailor who would be willing to do so. I'm located in Philadelphia, although I'd be willing to send my things somewhere else. Can anyone point me in the right direction?