Not sure if many dealers do it but my dealer has been selling Triumph since the late 50's if memory serves (could be early 60s) and right up until they stopped importing them to the US. They have always had Triumph logo shirts and sweat shirts and such with their shop name on the back. I have old ones and new ones from them since I have been dealing with them for Triumph parts for 20+ years.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!