To be perfectly honest, I purchased them from an importer who had them advertised on ebay
Not sure how he actually got them, but I only paid $70 from them and picked them up from his place..
Not sure if they were on a C33 or R33... They are pretty cool though
Just checked his ebay profile (he had a few plates for sale).. Anyway, doesn't look like he's a registered user anymore as of the 15th Jan...
http://myworld.ebay.com.au/attack_rb26