Sure, button head screws look very similar to rivets and work great for stuff riveted to plastics. You can buy a bunch cheap off ebay. Here is an example where I used them to replace the right upper pf sign on my TZ.
ebay.com link: 5 40 Button Head Socket Cap Screws Allen Hex Drive Stainless Steel 18 8 Qty 100
ebay.com link: 5 40 Coarse Nyloc Nylon Insert Locknut NTM Thin Stainless 18 8
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