Thanks leckershell. Nearest Primark to me is miles and miles away (sob sob).
I found a lady in the US who makes baby belts from webbing ribbon (you get to choose the colour/pattern ribbon) and that works out cheaper than buying them here. They work out to be £4.50 for 3 ($9), plus postage. I've ordered them and will see what they are like. However, being the accessories freak I am, I am still on the hunt for baby belts..so do let me know if anyone is selling any!