It doesn't sit well with me that if I ever get a flat tyre I'd have to put my faith into the foam-in-a-can potions. The wheels I have use a valve that is not usual and I wouldn't want to mess it up with that stuff. I looked at having a spare wheel again, and found the OE spacer saver won't fit over a K-Sport 356mm caliper without a massive spacer in the region of 90mm
Supra Space Saver
So I looked around the internet to see if I could find a suitable space saver style wheel and found a RoadheroV2 model that might work. Some back and forth emails with the company selling it with caliper templates and Supra hub specs and they confirmed the RH198 model will fit over my caliper.
https://alloywheels.com/spacesavers/spacesaverForCar/2297
I bought the wheel and was waiting for a time to test fit to confirm fitments, and I'm pleased to say that it does!
RoadHeroV2 RH198