Is there some kind of store where I can go and do this? I have some cool ideas for T-shirts and I'd like to have them made... just for fun. What kind of store should I look for?

i have ipodicons but i dont have any icons to replace them with...

My 1SG and I are looking for a website or vendor that can provide custom artwork for our unit t-shirts. We're a support unit with a focus on maintenance, but we're basically looking for some cool artwork for the back of the shirt that our guys can wear and be proud of. Does anyone know of a good resource, whether a vendor, artist or website, that we can look into? Thanks so much for any help.