Here is the 67 Coopers I have been using since 2006. They are a mixture of the GPLEA an Luc Van Gossum Cooper carsets, with some extras thrown in from Fireyes, Tifo, NES, CJM, and myself. If you don't like my mirrors, just leave out the 3dos. It's been a while but methinks that should still get all of the mips in there ok.
To install: Unzip this to a safe place. Then back up/ rename your working 1967 Cooper folder. Then move this folder into your "C, D or whatever hd"-> Sierra-> GPL-> cars-> cars67 folder. Then take it for a spin!
There are options to drive the Works, Bonnier, Siffert, Ligier, Moser, Custom, and WW2 cars. Pick yer poison.