Rules need changed. When you cant ‘buy’ the part somethings wrong. As a recent judge having original tires and wheels from another owner “borrowed” to a car pisses me off. If the owner of the car being judged does not own the parts to his/her car its wrong.
Just throwing this out there.
If we restrict loaning, borrowing or renting parts, what would keep someone from buying the part(s) with an agreement to resell them once finished with them? To chase it further down the rabbit hole can we restrict the owner from removing any parts after they show the car.
We do all realize that there are no rules that require you don't even have to own the car you show. In theory (or in real life) you could rent or borrow a car to show it and get an award with it.
Lets be honest there would be no way of policing a rule that you can't borrow parts