Where can I find a "What's all this then" (with helmet graphic) T-shirt?

I swear that I saw it once, but now I can't find it.





It was a t-shirt with a graphic of a custodian helmet (the type worn by many British police officers) and the words "What's all this then?". I've found t-shirts with just the words, but I really want to find the graphic one for my brother, who is a police officer of English ancestry.





What's a custodian helmet?:


http://en.wikipedia.org/wiki/Custodian_h...
Where can I find a "What's all this then" (with helmet graphic) T-shirt?
check out, wet seal, charollete russe [i know that's spelt way wrong], zummies, or possibly target may have cool tees . .