Hi Jess,
While not on track, we've run Michelin Pilot Sport 4Ss on our Focus RS for over 35k miles and they've been fantastic. I've also been running them on my 718 GT4 for around 2k with the same results, and the Ring Taxi cars run both Cup 2s and PS4Ss - the PS4Ss mainly in the wet. I can't recommend the Pilot Sport 4S highly enough, but make sure it's the 4S not the regular 4 if you go for them.
However, a quick search on BlackCircles shows that both Cup2s and 4Ss are available in the sizes you mention:
Pilot Sport 4S:
https://www.blackcircles.com/catalogue/michelin/pilot-sport-4-s/235/35/R19/Y/91/m?tyre=35790898
https://www.blackcircles.com/catalogue/michelin/pilot-sport-4-s/265/35/R19/Y/98/m?tyre=35790897
Cup2:
https://www.blackcircles.com/catalogue/michelin/pilot-sport-cup-2/235/35/R19/Y/91/m?tyre=32916478
https://www.blackcircles.com/catalogue/michelin/pilot-sport-cup-2/265/35/R19/Y/98/m?tyre=32847183
-Dave
While not on track, we've run Michelin Pilot Sport 4Ss on our Focus RS for over 35k miles and they've been fantastic. I've also been running them on my 718 GT4 for around 2k with the same results, and the Ring Taxi cars run both Cup 2s and PS4Ss - the PS4Ss mainly in the wet. I can't recommend the Pilot Sport 4S highly enough, but make sure it's the 4S not the regular 4 if you go for them.
However, a quick search on BlackCircles shows that both Cup2s and 4Ss are available in the sizes you mention:
Pilot Sport 4S:
https://www.blackcircles.com/catalogue/michelin/pilot-sport-4-s/235/35/R19/Y/91/m?tyre=35790898
https://www.blackcircles.com/catalogue/michelin/pilot-sport-4-s/265/35/R19/Y/98/m?tyre=35790897
Cup2:
https://www.blackcircles.com/catalogue/michelin/pilot-sport-cup-2/235/35/R19/Y/91/m?tyre=32916478
https://www.blackcircles.com/catalogue/michelin/pilot-sport-cup-2/265/35/R19/Y/98/m?tyre=32847183
-Dave