You can get replacements at Advance Auto, O'Reilly's, NAPA, Auto Zone, Parts Plus, Pep Boys, just about any auto parts store. They all carry the same kit for about $4:
BWD - Fuel Injector Seal Kit
Part # 274081
Comes with the two big O rings, the spacer, and the cap.
Quotes to live by:
guessing gets expensive
nothing is more expensive than a cheap BMW
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito)
Ken Kanne, Silverhill, AL, E36 Forum Mod/Craigslist addict/Hoarder of all sorts of stuff
1995 318is "Bebe"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette"