Nitrolon also has very good shock absorbing properties when comparing it against an Aluminium SureFire such as the C2.
Basically, I believe you are asking for an LED Bezel made from Nitrolon for the G2 and RG2 SureFires.
I'd like to see this too.
I have no idea if it's something SureFire are planning. I'll make a point of suggesting it.
Al