I know some people find they need a little more support out of their race seats, you can get lumbar pillows and suchlike that velcro to the seat back wherever you need them too. I've had my Evo 2s in my Subaru for over 2 years now and they've never given me any trouble like that.
I'm not really sure I understand what you are saying? You have back problems because of the seat, or you are noticing them at work? If you are having problems at work, talk to your boss or office services people and see what they can do for you.
Drag racing is for fast cars. Solo 2 is for fast drivers.