gme sales

I’m not exactly sure where to start however I am looking for cheap reading glasses wholesale. Does anyone have any suggestions or ideas? I am trying to find them at wholesale so I can get as many as I can with the funds that have been donated by a local retailer. I am volunteering at one of our local area shelters and one of the needs they have is for reading glasses. I want to be able to get as many as we can so we are able to help more people. Again, if you know of a resource I would really appreciate it.