Thanks to the good advice from this forum, I had my car re-upholstered at an excellent place:
Arnulfo Garcia Chacon
Tapiceria La Colonial
Frederico Tena #34-C
He did an terrific job. My seats look factory-new. It cost 2,400 pesos/seat.He replaced the seats and seat backs, but not the sides because they were ok. He has secure storage for one's car. It took 3 days to do.
This morning I am taking the car to be washed and detailed at the place on Porreras west of Frederico Tena, and will report back.