Alan,

I suppose you might do ok acquiring the rubber seal rings from a local/generic auto supply outlet or hardware store, however, my general experience in acquiring seal rings, washers, cotter pins, and the like is that the ones I do not get from M-B usually aren't *exactly* the same size as what is recommended. In a pinch, I'd probably settle for the generic, however, being that these parts are so inexpensive, my usual technique is to simply order a handful whenever I order other parts and just keep them in a plastic bag labeled as to what they are for, what their part number is, and then use them as I go. A process that has worked well for me so far.

Good luck-

Terry