anybody got a 10 & 1/2 right ?

If my foot remains as swollen as it is (and who could blame it after having been so rudely separated from it's friend the leg), my feet will have different shoe sizes.

I wonder if there is a website where people can exchange shoes, say I need an 11 for righty but a 10 for lefty and somebody needs the opposite. There should be a network of shoe swapping.