I know these cup washers are available from a couple of our parts vendors and maybe Mercedes (if I had a part number), but I just could not swallow paying 3 bucks a piece for something that should be pennies — just because.
If someone needs these, they are available for about 8 us$ for a box of 100. Didn’t know what they were called as cup washers seem to bring up different items.
You can buy them from clipsandfasteners.com directly or they also sell through Amazon.
They are quite perfect - a hair smaller (9.5mm vs 10mm outside dims)than original but not noticeable when looking at actual product. These are the ones listed for screw size #6. I also bought a box of number #8 in case I need some for the larger screws. Not sure if I will need these larger ones.
The #6 are also used in the glove box.