I'm trying to find a pair of trousers for my brother who is in is late teens and put on a bit of weight recently. He is trying to lose it, but in the meantime needs some trousers to tide him over. So, they've got to be cheap. His waist size is 42" and all the trousers I've seen go up to 38". I've tried Primark and TK Maxx. Does anyone know where to get trousers for larger young men? How about H&M or Gap? Thank you!