TEST used to have a bucket hat and a woolly hat but they aren't available any more.
Being in the UK I could never afford the shipping anyway BUT there is a work-around: TEST does have some patches for sale. You could get one
and attatch it to a hat of your choice!
Hello TESTies! Recent scientific studies have proven that drinking beer from TEST branded mugs actually improves your combat skills by 42% and also makes you more attractive to the opposite sex, or same sex. This was just a small hobby of mine I did for fun, but after being bugged by Montoya...
testsquadron.com
It's not a perfect solution but it'll do for now!