Traverse rods are built to support heavy drapes (as there is no real limit to the number of brackets they can have) and can be found in wall as well as ceiling mount.

Vertical blinds are what you are taliking about and I just wanted to replace them for a clinet in a wheelchair and was told the chains are no longer available for whatever reason. I like ripple fold ceiling mounted they look nice and function well . I usually use a very light weight linen or sheers and good drapery shop witll have the right hardware for install.

Did you look here? They seem to have commercial quality hardware: Drapery hardware