Try Wet&Wild graphics they do allsorts of stuff, transfers as big or small as you like, they also do embroidery for t-shirts, jumpers etc... are competetivly priced and quick in both manufacture & delivery..... try WWW.Wet&Wild.com for further details and prices (listed on the site)
Go to your local High St sign person who makes vinyl signs for shop windows. Got mine done for a tenner each, you get a choice of fonts/colours, you can discuss sizes and what not, and if you carry cash, you may get a vat-free deal.
Steve, I agree with Sue. Check out the Yellow Pages and phone around locally. Most sign writers now use computer cut lettering now. I got a set in 6" high script (three names & Port of Registration) done for £25 from a company that do scenic work. Phoned at 10am and they were done at 4pm. Good luck, Eddie
Richard, They stick just fine, I dont think there is any difference in the materials used. In any case if you tell them what its for they will know if its ok. The same systems are used on vehicles that could be subject to car washes etc. You just need to ensure the surface is clean & dry before application. I belive the adheasive improves with age also. Regards, Eddie