Does anyone have a list of wall mounted equpment rail types?

Hi. we're currently doing a lot of rebuilding and reshuffling at the hospital i work at, this means half of the building is very new and modern. some of it is stuck in the 80s. and even more of it is stuck in the 60s. this also means we have several different types of equipment rails. and as a result, we keep running into this annoying issue where we have some type of Equpment mount which doesn't fit our new equipment rails. does anyone know if there's a list somewhere of the different equipment rail standards? so i dont have to keep describing the shape and size of our equipment rails to suppliers whenever we need new mounts? thanks :)