Hi OP,
You may want to read the following thread in its entirety.
https://pinside.com/pinball/forum/topic/tftc-side-armor#post-2612026
These DE side rails from Marco will fit on a TFTC. Click on the 'Product Compatibility' tab from the Marco link below and it now lists TFTC as a compatible game. The OP of the thread above used them on his TFTC and when I had my TFTC restored almost 3 years ago a set was installed on my TFTC and they are a perfect fit.
https://www.marcospecialties.com/pinball-parts/535-5010-3X
Gord