I do love an old school options sheet! I'd go with the Meccano option along with the weather pack, the lowered floor, push button start, Momo wheel and the heater in the free yellow and I'd potentially get a black wrap on the body. Nice and simple.
Tonneau cover, lowered floors and leather seats. And get a quote for some 6 point harnesses rather than inertia reel belts. Everything else is a waste of money, unless you really have to have a windscreen. Which you don't.
I'd love one of those 3-pot Sevens alongside a boggo-spec Dacia Duster 4x4 for loads of fun, zero stress motoring.