Shirt printing - rotherham/sheffield

I've got an old football shirt I wanted to print a number on the back of, but i don't have a heat press and all that. Are there people online or shops that offer that sort of service? I've seen a load of old name and number sets on ebay. I live near sheffield/rotherham. Hoping for any help, information, advice, anything really, as its an area I'm new to!