As Shaun suggests.
However, if you are going to continue to compete, I would suggest you put the refurbish on hold until you decide to stop.
I refurbished mine with a full strip, repanelled new paint etc., then only a year later I put it into a tyre wall at considerable speed, with the car requiring a big rebuild......
Also, I see you mention a rollbar (and I guess you are using a petty strut too). If you want to spend money now I suggest it is well spent on a SLR type cage, far safer and you can sell it on when you stop.
When you ultimately refurbish the repanelling will delete the cage holes in the side skins.
Hope that helps!
Malcolm