hey man, got your PM so I will answer both questions here at once.
-I got the paint reflector from **********s/bimmian.
-You can still chip a NA car. I remembered I did ECU tuning on our E320 it yields about 10-15 hp.
If you are local, check them out. I did my from them. Paid about 450 OTD. Ask form Minh, he is very knowlegable and legit.
edit: even they didn't list E92, call them and I am sure they have something for you