Quite a lot to choose from here (select front or rear axle box near top) -
https://www.buycarparts.co.uk/mg/mg-...132/brake-disc. Whoops, sorry, those are all solid.
Rimmers page shows solid, grooved and vented -
https://rimmerbros.com/Item--i-GRID001571. Vented is SDB000010 (MGR or EBC). Or, there are these
https://www.buycarparts.co.uk/oen/sdb000010 - the TRW looks the best bet out of those - it's vented and painted. (TRW website -
https://www.trwaftermarket.com/en/pa...s/brake-discs/)