The Assetto Corsa time trial server is still running Brands Hatch with the Escort RS1600 and the McLaren F1 GTR if you want to try setting some times.
Everything is official content, but I put in a link to the DLC just in case you're missing it.
server: vrg time trial
pass: tfwnodriftfu
leaderboard: http://40.84.138.234:50041/lapstat
DLC: https://mega.nz/folder/BBwxhS6D#4jJIfs6omnJUaJfsnqPqGQ