I've talked to a rollbar manufacturer in Portland Oregon who will give a 20% discount on an order of three Solstice rollbars.
I am not affiliated with the manufacturer, just an enthusiast that would like to continue my HPDE hobby with my new(to me) GXP, I assume there are others out there that would love to have the same opportunity.
A member on solsticeforum had one built and I can direct you to photos.
I have two people interested, including me. We need one more order.
PM me for information since the vendor does not advertise on the forum if you are interested.
According to the manufacturer, it is legal for SCCA track days.
They specialize in rollbars and Rob Mathis, who is the owner attends track days and other HDPE events in the Northwest and their main business is building racecars. He seems pretty knowledgeable about the rules and says his rollbar will meet the rules.
The manufactures web site "guarantees that the rollbar will pass SCCA inspection or they will buy the rollbar back".
I suggest you contact him and quiz him about your concerns.
Prices are on the Web site.
We are not allowed to discuss this roll bar too specifically on this forum since RPM Rollbars is not a sponser. I'm trying to get him to advertise on the forum so we can discuss his products openly.
PM me if you want to be included on the order to get 20% off.