@antspants Hi Anthony welcome to you and good luck with your search, blue is by far the most numerous colour for a Rcf, a few numbers for you there are last time I looked 169 Rcf and 25 Carbon cars registered here since release, so yes not many.
Invaribly if a Rcf has TVD it is most likely an ex Lexus press car journalist - magazine past life to it but there are the odd exception if you want to I can help, @Jonb recently bought a blue one with it and it was privately owned so they are out there.
The Carbon cars all have TVD as standard
I agree wholeheartedly with what @Comedianhas said regarding handling use of the vehicle.
Ive driven both many times and own one without it, as regards sales there is usually about 8-12 for sale at main dealers at any one time and according to my data 9 have sold since mid January at main dealers and 3 at others.
There is some great help on here to be had and if you want to know about a cars past your interested in drop me a pm 👍
Big Rat