I would go a similar line to misterescort in the link posted earlier.

Make the bodywork mint
nice ride height
rs turbo interior - a must!
decent looking alloys - maybe in a dark grey graphite finish
decent back box
maybe an rs bonnet

That would be about it, a little but euro but custom styled rather than stick on kits that make it look like a botch up. Super clean and simple with nice rims - job done!

Run it like that for a couple of years until insurance permits you to have something quicker.