Where can I get authentic stitching done on a blank jersey?

Long story short - one of my best friends wants a white Zimmerman jersey with the WS patch on it - they don’t exist on MLBshop and I’d rather not get him a different player.

I was planning on buying a blank and then sending it somewhere - can anyone point me in the right direction to get good work done for a Nats jersey? Appreciate it, and I apologize if this isn’t the proper way to go about asking this question.