You can borrow 2D or 2J cars
2D needs a bit of luck with a 1967 ticket
2J needs a bit of luck with a 1970 ticket
(I think both are Level 23... maybe...)
I have both and you can borrow. I also have 70 and 67 and level 23 tickets.
If you have a flash card you can get a ticket... save the game to the flash drive and open the ticket until you get the car you want... But this is a tedious thing to do.
If you borrow a car you are stuck with the car as it is, if you change out of it... and then borrow again, it will be exactly as it was the first time... so you will need to put in your own favourite set up for it, or hope the borrowed car comes with a good set up. (Mine don't!) Still it isn't that hard to re input your own set up each time you borrow it.
If you wish to trade tickets then I like Orange Paint chips.
FR me ( Ryk_BRM ) mention "2D borrow" then I can put one up. The 2J is set up for 650pp races I think.