The large fill plug is 01V321376 and it's o-ring is 01V321379.

The small one is the drain plug 01V321377 which has the seal built-in.

Thanks for that

Does anyone know anyone around Leicester who can do a gearbox service for me?
I have all the parts just needs doing?
Thanks

Managed to get my gearbox serviced
Has cured the gearbox pan leak as replace all bolts and the drain plug bolt - bought original from Audi
thanks for all your help