I have a lot of TTUX cars, Lionel 6-52014, Burlington Northern, 6-16363, Southern TTUX, 6-16904, NYC Pacemaker TTUX. I also have CN Maxi-Stack 6-16912, and MTH Premier BN Husky Stax (20-9502L). Your post is not very specific so it opens up possibilities. Let me if these are of interest.