With these printed parts, a squash ball, and following the instructions here:

https://www.xsimulator.net/community/threads/diy-load-cell-brake-on-thrustmaster-2-pedal-set.16009/#post-215374

you can quite easily convert your crappy pot based 2 pedal set brake to fancy loadcell based one.

Just need to drill 2 holes on base to insert loadcell base holding screws, and a square cut in the cover to allow the loadcell sticking out. Also 2 small drills to attach the brake stop, but it could also be attached with double sided tape.

UPDATE 1: more resistant load cell support part

UPDATE 2 (OCT 2022): replaced load cell support part for an even more resistant one, and also added brake stop to avoid stressing that part when slaming brakes (it happened to me in online hard battle).