There’s a body shop in Ranchito, across the street from the plaza de toros that helped me with a similar door panel removal and fix of something.

Probably six doors north of the green bus station on the west side of the road. Easy to miss, look for the cars and the banging of fenderwork.

I’ve forgotten the guy’s name, but he did competent work and suffered my Spanish politely :-) .

Good luck.

EDIT TO ADD: The proprietor of La Sirenita carwash introduced me to the bodyshop. He can show you the way if my description is insufficient.