Been there! I tried the Basenor ones – around $50. Unfortunately, they didn't fully protect the paint behind the rear wheels like I hoped. I'd suggest looking for something a bit wider, even if it stretches your budget a tad. Might save you on paint correction later! Happy to share photos of the Basenors on my 2020 Model 3 if you're curious.

Beyond aesthetics, consider material. Stiffer flaps deflect debris better but might crack in extreme cold. Softer ones flex, lasting longer. RPM Tesla offers a decent set around $80. Make sure the mounting hardware is stainless steel to prevent rust. Cheaper flaps often use inferior hardware; I would suggest checking that first.

Beyond looks, think safety. Cheap flaps can crack, detach, and become road hazards. I've seen it happen. Consider RPM Tesla; they're pricier but seem more durable based on '21+ data.

Before buying, measure your wheel well. Some cheaper unbranded flaps on eBay need slight trimming, but save you about $40 versus branded options.

Aftermarket's flooded! Basenor's solid for $50. Good value; no complaints after a year.

Skip the pros! For $30 in materials, you can fab your own. I used basic ABS plastic sheets from Amazon; no complaints after a year. Works well!