Think about this calmly...
Per the rules, Toyota must make the part available. They want to control, absolutely, who gets their hands on this. They have enough issues with people whining about condensation in their tail lights FFS

Imagine if Bubba got his hands on a supercharge kit
You seriously think that Toyota might not "discount" some of these kits to chosen race teams?
You, Bubba, ain't gettin' no discount