Here are some of SteveO’s product recommendations:
14" Ettore Brass Channel: https://shopwindowcleaningresource.com/ettore-master-brass-channels.html
LedgeEze Handle: https://shopwindowcleaningresource.com/ettore-stainless-steel-ledge-eze-handle.html
16" Unger S Channe: https://shopwindowcleaningresource.com/unger-s-channels.html
18" Pulex Alumax Squeegee: https://shopwindowcleaningresource.com/pulex-alumax-channels.html