Perhaps someone knows of a source, but these were NLA in chrome when I bought mine. Stan was kind enough to sell me a chrome one.
Not my listing:
https://m.ebay.com/itm/BMW-E9-Trunk...romed-plastic-screw-71111117440-/362136366925
Not my listing:
https://m.ebay.com/itm/BMW-E9-Trunk...romed-plastic-screw-71111117440-/362136366925