I've just seen that Mike is stating to sell these :

https://passionford.com/forum/trader-parts-for-sale/260327-essential-track-day-product.html

Has anyone had any experience with anything similar as it looks like a bloody good product, I can think of a few times now we've wrecked rubber from not checking them enough or getting a bit keen and staying on track a bit longer than we should of.

Where the hell do the sensors go ?