Need help IDing this seal.

[ube91]

Chasing down some water leaks in my 1991 318i sedan and it looks like this drivers' side door seal might be a culprit. The seal begins at the B-pillar and wraps around the entire door before returning to the B-pillar once again. Any clues as to what the seal's part number is much appreciated. Cheers!

[Skarpa]

http://bmwfans.info/parts-catalog/E30-4-doors/Europe/318i-M40/L-M/jan1990/browse/vehicle_trim/edge_protection_coverings_rockers/

51711906959

[twright]

The BMW seals are pretty expensive. There is lots of discussion elsewhere on this board of good inexpensive replacements.