Is there a good (and quick) way of cutting thin (roughly 2mm) wax slices from a block for carving?

It takes me an age to saw through the block of wax, then my slice is so wonky I have to spend another age filing it all down so it's a flat slice.

I'll be using these quite a lot for some upcoming projects so was wondering whether it's worth investing in one of these: http://www.cooksongold.com/Jewellery...rcode-999-3339 which looks like it could be used as a mini bandsaw, or is there something smaller/cheaper out there that might work?