I bought these from https://www.oponeo.ie/ for my 2016 IS300H FSport which matched originals.
Bridgestone Turanza T005 DriveGuard 225/40R18 92 Y RUN ON FLAT XL, FR Quantity: 2 x 104,00 EUR
Bridgestone Turanza T005 255/35R18 94 Y XL, FR Quantity: 2 x 134,00 EUR
No complaints on them - have had them on 6 months and no issues with performance but less usage due to lock down - up front I'm no tyre expert.
I had them fitted by Toyota/Lexus main dealer in Dublin. I called a few other places and wasn't confident they had right equipment for balancing/tracking. Dealer was more open to doing it as they didn't have tyres in stock during my service. Long story but when they fitted tyres, they damaged 3 alloys so ended up having getting the alloys refurbed due to their mistake. I paid for the 4th one myself. Keep a photo before and after of your rims to be safe.
PS: - the "rim" protectors on the tyres are no match for a curb - my newly refurbished and shiny alloys got destroyed within 6 weeks.....not by me.