With the Hiro kits and Matrix 1:43 scale models very hard to find, I went with a used MMK 43 slot car of the AC A98 Coupe. It took a little diddling to get the driver on the correct side of the car, a wiper on the windshield, and better ride height, but overall, I think it came out a presentable curbside model - albeit with the wrong coves behind the side windows.