I've just returned from a foraging hunter-gatherer expedition with a big mens bum/belly covering wicking T-shirt for the Asda price (pats arse pocket) of just £12!
They have mens T's in 3 styles, 2 vests, but also wicking brief or trunk!
They're not too offensive on the eye, although it has to be said I'm not bothered about fashion when running as any ensemble is tooped off by a bright red sweaty beetroot snot head!
Didn't see any wicky stuff in girls section, but I prefer to hang out in mens' underwear ;)