Low back seats, roll cage, and harness?

[Flash68]

I have already purchased the ISS seats for my Camaro and really like them and their shape. But I also am coming up to a point where I need to decide if we are going to do a roll cage or not. I would like to do one for obvious safety reasons, but I am under the impression that by using the low back ISS seats, I have no way to tie in a good 5 point harness as I would be if I had one of the high back racing seats with the harness inserts to tie in the cross bar of the cage.

So, does anyone know of a safe and nice looking setup to use with low back seats and a roll cage? Does the only way to do this right involve ditching these seats?

(attached pic of what I believe are the same ISS seats I have - if not, they are roughly same dimensions. Thanks to Bob the Camaro)

Thanks.