TMAP o-ring not sold by BMW. I did some digging and came up with 2mm thick x 10mm ID x 14mm OD. I believe these will do the trick:
https://www.ebay.com/itm/Viton-FKM-...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
Filippo
https://www.ebay.com/itm/Viton-FKM-...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
Filippo