Rob Schofield and his wife produced a small run of embroidered empeg T-Shirts about a year ago. Have you considered asking him if he'd be interested in producing this batch? Presumably he already has the program for his machine.
I would want to see the design or a sample, and then I will provide whatever permissions are required. I'll have to check with Rio Legal, but I'm sure there won't be a problem.
David (
[email protected]) produced the now-defunct empeg style guide, so he should be able to provide you with the design criteria that you need.
Regards
Rob