Portable Oxygen Concentrators (POC) repair/service

Asking for a friend: Potentially will be bringing a POC to Ixtapa/Zihuatenjo for 4 to 6 weeks in early 2022. Just in case, are there any places/companies that can provide service/repair/replacement parts, IF NEEDED? Thanks, in advance.

I believe there is some detailed info about this from a few years ago if you search for it here in the Message Board, but the answer is YES. My mother had one of these and I bought the small oxygen tanks for it near the Clínica Maciel. That was over 5 years ago, so there may be other locations now.