Hi and Welcome,
I cant think of any NA's that cost that much? The prices vary alot depending on upgrades, milage, service history, UK/Jspec, Auto, Manual, TT, NA, Single etc etc.
For the 8k youve quoted and the fact you say you are looking for an NA initially due to insurance id say you'd have enough to buy a decent NA, well looked after, good history, relatively low milage (and possible aerotop if your looking for a topless run in the sun) and still have change for rainy days or cheeky upgrades until you feel you can step up to the Tubbys.
Check out the classified on here, the owners cars are well looked after by enthusiats so you wont go fra wrong if you take a fancy to one of theirs.
Good luck with the hunt.