I'm looking to make some small cloches for my garden, and the idea I liked the best was to use the cloche clips I've seen online to snap together some pieces of polycarbonate. The only problem I'm having is that, after much google searching, I can't seem to find the clips anywhere - except the UK, which doesn't help me very much in PA - US.

Does anyone know a place in the US, online or otherwise where they sell these things?

Thanks in advance.