TKMaxx have got a fair selection from a few seasons ago, most sizes, around £30 or £40. Got a fairly decent Ocean Pacific pair for £39.99. (Can't speak for every branch but, Kilmarnock and Layton certainly had a few pairs)
I am short too, I bought a pair of kids size, they are still plenty big inside. If you leave near a outlet mall, does it have a tresspass or regatta shop I found some great deals in both of these.
If I don't sound too pushy, I won't acutally be needing mine again, used for 5 days skiing, I bought them brand new for £44.99. They are black, very warm, with snow skirts, you can have them for £25.