I would agree, fibreglass is much tougher and easier to repair. It's generally lighter as well. A mate put a plastic fairing kit on his 1000RR and when he crashed everything just shattered into pieces.
Race Glass Motorcycle Road and Race Fairings.
I run my race glass on the road as well and I just cut it out to fit a CBR250RR headlight in the front and the indicators are velcroed onto the fairing. The licence plate, LED tail light and rear indicators are all part of a modified GPX250 rear guard that simply attaches to the underside of the tail unit. It only takes maybe five minutes to fit the lights and mirrors for road use.