Yes I have HID projectors on my car, and the rings are fine. I'm not trying to talk you out of the aluminum, Lambo uses that as well and thats the best possible ring. The resin I use though is not the cheap FastCast that CKI and Rob/Joe use for their parts, its much more heat resistant and stable when cured.
I've seen the rings that KI put out, and your right they are pretty bad. Mine are moulded straight from the OEM piece, not like others that are a 3rd or 4th generation cast.
I've sent some out to a few members here, and I think theres pics of them somewhere on a thread.
(Go Ravens!)