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I don't recognize it either as a standard Jaguar XK8/R wheel. Your best bet is to remove the wheel from the car and check on the inside of the spokes for any markings or part numbers. Check if there is a spacer. Check for evidence of machining on the hub. Take pictures and plug whatever you find in your favorite search engine.
Well, the company that made these has been out of business for a while. The wheel is The Stern ST-1 Face III Beast-Hyper Silver #11788. Too bad. I guess my search will continue with another design.