Have no doubt, that wheel carrier will do the job. There are plenty on eBay, I have a saved search and would see a couple a week come up.
Why do you want one? If it is just to relocate the spare I would advise against it. If you want to carry a 2nd spare this would be a relativity cheap method.
I have a full Kaymar rear bar with a LHS wheel carrier. The bar is great, strong and attractive, though heavy. I had the bar on for a year before I added the wheel carrier. I reckon it looks terrific and I've added a light pole which I value, but I will tell you it is an absolute PITA to have to open the wheel carrier every time I want access the rear of the Cruiser.