I think this is the best decision for now Andy.
Maybe later, when things (Leagues) get settled down, we can organise a full skin pack across a range of cars (just a few extras for the cars with very few choices) which we can install on the server (in one go) and request all entrants in future races to install.
That way, the admin workload is minimised and we have some additional (but limited) choices for all future events.
No promises but I'll look at it sometime later.