When we first joined the scheme 14 yrs ago, we found a stock car (but had to get a slightly different colour) dealer rang round and bartered a deal to swap their wrong trim stock car for another dealers car coming in on the next ferry.
We had a private car at the time so we weren’t really desperate for one straight away, after that as you already have a car the wait times aren’t as much of a problem as you just extend the current one.
Would imagine it being a nightmare waiting without any car,