I am looking for the same and currently am looking at tornado sports cars uk as the rf is claimed to be a very similar copy. However I was very impressed with those of spf in SA as they heated and warped the window to achieve a flush fitting of the small flaps as per original but with a good seal.
Paul and Owen are assisting the current owners as much as they can. Paul has been a great help in supplying ADR compliance info for my registration application just recently. One of them may chime in here if they can help. If in time you are still without a source let me know but I would imagine that there is someone out there who is making these bits up in economical batches.