Greg at RTBB.com sells them. Try him
http://www.rtbb.com.au/catalog/product_info.php?cPath=43_166&products_id=1403
Yeah, they are the ones I saw but the set from RTBB is not the same as the set from Pinbits. I think I will go with Pinbits because I can get a full set of plastic protectors (including the ones that sit above the middle ramps) for $USD40 plus shipping. I just thought it might have been possible to get the protectors locally and save on the ridiculous shipping charges!
Matthew