Roll Bar Help!

I have a low mileage original 93 Mustang GT (hatchback) in show quality condition (was). Here's my problem; I have a large stereo system in my rear hatch area. My car is getting stress cracks everywhere in the body (quarters/roof). I have subframe connectors, G-load brace, strut tower braces, etc. etc. etc. Any way I was looking for a 4 point bolt in roll bar. I found one that doesn't interfere with the factory plastic and it doesn't go into the hatch area where my stereo system is. The problem is it was made by Steeda and they don't carry it anymore, even though it's still listed on their website.

Here's a discription from their website:

Our most popular Roll Bars! A stiff body structure is essential to great handling. Four point roll bars stiffen the structure of the car, prolonging body life, preventing squeaks and rattles, and improving handling. Our street roll bars allow the rear seat and interior trim to remain in place, and do not interfere with convertible tops.
Part#017-71260 1979-1993 Hatchback & Coupe Roll Bar $269.95

PLZ, Does anyone have any idea where to find a similar roll bar fast?

Great!!!!!!!!!!! Thank YOU VERY MUCH!!!!!!!!!!!!!!!!!!!