EuroCarParts
Authorised Forum Sponsor
I was just about to post that!! That's usually the first cross reference I make when looking for a price followed by car parts for less and then bestpartstore. KMS on eBay are also good for w124 parts but they have some parts that are overpriced and other parts are cheap compared to competitors.
Having said all that despite shopping around I still can't find a front window motor for my w124 coupe for 6 months now so what do I know lol
If you give me your registration number I can have a look for you to see if we can source it.
Kind Regards
Jack