Looking for Racing Hart CP-035 18"

I'm looking for a 4th rim for this set. Anyone know where to pick up one of these in Ontario (or even NA in general)? RH Evolution are Japanese made rims and I'm just missing one. Any help would be appreciated.

They don't make these anymore, which makes it all the more rare and harder to find. If anyone knows of where to find these in NA, please let me know. If there are some still available in other countries, how do I bring them over?

Full name: Racing Hart CP-035R - 18inch

http://imgur.com/gallery/qls1i/