I have a number of manuals that are loose-leaf with no hard covers.

They are punched with the standard Teletype 4-hole pattern.

I'd like to put them in report covers of some sort.

Does anyone have a source for 4-hole binders or report covers?

Or 2-hole (7" spacing) that fit the Teletype pattern.

Otherwise I have to bind them with zip-ties or re-punch them with a standard 3-hole pattern (8.5" spacing)

Thanks