Ye ditch the shopping list, its a bit 2003, lower it, what engine you running, 1.25, 1.3? It probably aint worth tuning the small engine, just an air filter and exhaust, you could spend thousands on it and only gain 20bhp, so my advise would be to wait until you can afford to do an engine transplant or buy a quicker car.
1.3 and only cost £230 but I work in a car parts shop so getting hold of parts isnt Problem