1:40 actually, you are correct 😊 The three-piece spoiler only came on Turbo models ('89-'92). A one-piece spoiler only came on '86.5-'88 Turbo model. Non-turbo models came with no spoilers, but the third brake light is present behind the rear hatch/lift back glass towards the bottom.
Helpful man, thanks! Im doing this on my 86.5 supra, changing out the 1 piece for the 3 piece. Can confirm that they share the centre holes. Will keep watching.
They are getting harder and harder to find. I'd see if a local toyota dealership has them or maybe poke around on ebay. Luckily most of mine were still in one piece.
I purchased a competition engineering universal kit from summit racing. Rhodes racing has a kit now specifically for the mk3 supra for about $360. The cage I bought is only an 8 point. The Rhodes is a complete full cage.