Just installed a set of gloss black m3 style full mirror replacements from ebay. Very good quality and perfect fitment. Took about an hour to install both sides. Looks exactly like the previous posts. Link below. The seller gave me a one-time $20 discount code too so the total was $100 shipped. The full housing replacement looks a lot better from the driver's view in my opinion. Let me know if anyone wants pictures.
https://www.ebay.com/itm/TRUE-M4-SID...72.m2749.l2649