I agree completely! I expect they’d have to scan a stock one as well as the Broadspeed race car, but the latter could be a Forza tuning upgrade to the stock XJ12C. To turn it into Steed’s Big Cat just apply the paint - and hopefully they allow the front licence plate to remain. Also his car had stock wheels that were much wider, so doable in current Horizon.
If only one option was available I’d pick the Broadspeed racer.