2 years ago I bought a Brey Krause roll bar extension here in the forum classifieds. When I got it, I contacted Brey Krause and asked them what kind of tape to use under the clamps on the top of the Boxster roll bar hoops. Not only did they tell me what kind of tape, they sent me a couple of pieces free of charge. Last year I started doing HPDE's. At those events, I noticed that other Boxsters with BK roll bar extensions had side brackets with grommets over the holes that go on the seat belt shoulder anchor points. My brackets didn't have those, just bare metal.
So I contacted Brey Krause again and asked if I could buy those pieces. They wrote back and asked me to send pictures of what I had. On my BK roll bar, there is a BK logo laser cut in a piece of steel plate that is welded to the bar. They told me that my unit was a pre-production prototype that was never offered for sale. And they mailed me the pieces I inquired about for free, including new nuts, bolts and washers. BK uses a mushroom head allen bolt, my unit just had standard hex bolts.
So I just wanted to publicly give a shout out to Brey Krause's customer support, they go above and beyond!