[Carol]

There are lots of local companies that provide custom printed shirts, and have access to many different sources of shirts. Go to one and talk to the people there - they know what is available and what is not available. I think it is always better to see something in person and talk to an expert than order online, unless you know exactly what you want. And maybe the store can provide sponsorship and give you a discount on the shirts.

Without knowing where you are located (please everyone, put a state in your location field!) it's hard to give advise on local stores.

Printing in silver may be a problem - I don't think that is common.