If you were to get yourself a Vega RB5 you wouldnt be disappointed. If you look back through the Vega owners feedback thread on here you will see what I mean....
The only downside if there is one is the cost. To buy the donor car and the conversion kit works out a lot more expensive to buy than say a new 210.
You do get 2nd hand ones come up occasionally though so that may be an option.....? There is one for sale at present on here, although I dont know the seller so dont take this as a recommendation for that particular car from me - just highlighting that it is there.