I am pretty sure a lot of folks go to dealers, and I'll bet they have all you need.

But I have been able to accumulate spares/extras on a few trips to junkyards.

I have a habit of ziplock bagging odd items "just in case".

So if you are up for it, find a wrecking/salvage yard with a few old Mercedes and scavenge some screws for later use.

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80 300D 340K Owned 30 yrs
83 300SD 440K Owned 9 yrs - Daily Driver 150mi/day
02 Z71 Suburban 117,000
15 Toyota Prius 2600 miles
00 Harley Sportster 24k
09 Yamaha R6
03 Ninja 250