I was in Gap to look at jumpers in the sale and came across these. I bought 3 pairs (one for me, and two for birthday presents for father & father in law), but there were still at least 10 pairs left. This was in the Birmingham 'Bull ring' store. I imagine it is countrywide though as the jumper I liked wasn't in stock there, so I had to go to a different store where it was in stock (at the same price).
If you are going past, it is worth taking a look and seeing what they have, though probably not worth a special trip to a store