Patio doors - replace / repair

Good evening, long time lurker and first time poster, looking for some advice / help.

We have a long term rental in Frigiliana and have problems with 2 sets of patio doors. I have been quoted a huge price to get both doors replaced. Can anyone advise anyone along the coast (Nerja direction preferred) who could either refurbish (tracking and lock repairs) or replace the doors without breaking the bank?

Thanks in advance

 I know of two brothers who are wood and wrought-iron craftman in Algeciras. Very well priced!