RigWheels have dropped Universal Rail Brackets, for any sort of pipes and rails you may wish to use on your slider…
Read a rip from their PR blurb:
These brackets are universal in BOTH width and pipe size so they can be used with virtually any suspended rail type slider/dolly on the market. You can use pipe with an outside diameter between 1″ (24mm) and 2″ (50mm). You can also use square/rectangular rails up to 1-3/4″.
The useable distance between the rails (center to center) is adjustable from 5″ to 21.5″ with the 3 different lengths of cross-bars we stock. You can also use full or half-strut widely available at hardware stores to make custom lengths.
We also wanted the brackets to be versatile in how you can attach them to stands & tripods. Most options on the market require that you mount your system to baby or junior light stands and in our experience this is not ideal. You can of course do that with our system but we give you some other great options for mounting that are MORE stable than just using a single light stand on each end.
Please see RigWheels for more on their Universal Rail Brackets.