I've just taken delivery of a 2019 Corolla Design 1.8 Hybrid TRK. TRK indeed! The dealer suggested that if I couldn't use the useless tyre repair kit, I instead use the breakdown cover if I have a puncture but in rural Scotland that could be a very long wait for a repair. I was quoted silly money from the dealer for a space saver steel wheel so I found the wheel geometry somewhere and it's the same as an Auris Space saver. So I purchased the Auris one and it fits both the wheel studs and under the boot floor. I placed the order on Friday at 4pm and delivered via DHL the following Tuesday.
Purchased from The Wheel Shop. https://www.thewheelshop.co.uk/toyota-auris-space-saver-spare-wheel-17-and-tool-kit.html
Don't forget you'll need the retaining bolt.