Could you post what it is you are looking for? There is a good chance that the items are available but not from an rv store (although there is one in Monterrey).
I say this after BrianSue had to replace a hydraulic hose and fitting on his motorhome levelers. All items were found, hose and connector made in less than fifteen minutes, and a complete success. They even carried the same manufacturer parts.
You might get lucky. (Brian, did I get that right?)