In search of single outlet for replacement LCD screens?

I run a small repair shop and have had my fill of dealing with ebay to purchase replacement LCD screens for virtually every brand of laptops manufactured today. Does anyone on TR have any pointers on where I might begin looking to find a singular source for these? What I need is reasonably quick shipping and (hopefully) a sales rep I can speak with in the event there are problems with any of the purchases.

While I haven’t encountered a lot of problems on ebay, occasionally one does need to be returned and the turnaround time is just ridiculous. That says nothing of the time involved in finding the correct screen, especially for any newer model laptops. Any help will be appreciated.