[Mark Worthington]

If getting it to look as close as possible to the real thing is your top priority, then you should look at monocoque cars in this order:

1) Superformance
2) CAV
3) RCR

The above assumes you don't want to wait for or can't find an ERA. All the rest are space frame chassis which make for fine cars, and can appear to be quite original, but aren't. The Superformance car is pricey but worth a look.