If you have one of these mechs, you'll know the little bugger.:)
I had some repro ones made.
Folded 2mm stainless steel, same as original.
Suits Mavic 800, 801, 803, 851 and 853 mechs, also known as SSC mechs.
Now on eBay (https://www.ebay.co.uk/itm/157460041518), or DM me here (£15 UK...