I know that winter is a long time away, but Clarks have a mid season sale and have got their boots from £40 down to £15.

http://www.clarks.co.uk/find/department-is-girls/mcrages-is-age22d4/product-is-20333733

I have taken a chance and got Aimee a pair in the size I think she will be. If they dont fit, you will get your money back on ebay xx