Try www.swracecars.com They custom make roll cages for almost any car. The kits are cheap but they charge you alot for labor to install it. If you know someone who is a good welder, it's a weekend job.
BTW I picked up the 8 point kit for my 69 firebird from them in my 89 MX6 LX. I could swear that kit would fit in my MX6 (installed).
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