Focusing/composing graflok back for Cambo Wide 470

[F64]

Hello,
I bought a Cambo Wide 470 with a 6x12 back a finder and no gg.
Now my primary reason for it is to use shift movements and the finder is fixed.
Is there a gg back I can readily (and inexpensively) find, or I am better off using a 4x5 film holder and placing the glass inside.
Am I correct in thinking that I will need it only for framing? I assume that focusing with the helicoid and closing a bit should suffice.
Thanks

[EdSawyer]

Any of the Cambo Graflok 4x5 ground glass panels should fit this, no problem.

[F64]

Any of the Cambo Graflok 4x5 ground glass panels should fit this, no problem.

Thank you. They seem scarce and expensive, though.
(unless I'm looking in the wrong places)

[Phil Hudson]

Often a complete Cambo monorail such as SC, SCX, etc, can be has for relatively little money these days. This would give you other parts to possibly sell to offset the outlay.