I've printed the final version in Taulman's "bridge nylon" (aka 645B), with internal supports (used Taulman/Dow USM during late prototyping, but with some care and needlenose pliers, breakaway supports should be workable too). PLA is definitely wrong for this task long-term -- one should use a material with some give to it, and that doesn't wear away on friction. PETG might work, but haven't actually tried it. The original screws are too short to reuse -- you'll want two ~22mm M5 screws (the originals have ~10mm of threading, and the part as designed adds 12mm to have plenty of contact area).