Now this is the type of thing i like to hear. We have a reasonable stock of shims here in the UK. I personally would be happy to swap shims and cost would then only be postage. If we do not have the right sizes and have to order from OZ my son lives there (Melbourne) and i have other OZ contacts too so could probably get better postage.
My suggestion at this stage would be for us both to get a list of sizes we already have and compare.