I'm new to LF so I really like the idea of taking a "Polaroid" shot before I waste a 4x5 negative.
The problem is, not only does b&w instant film seem to be out of production but I'm not sure what would go where.
Along with my Cambo were film holders:
Polaroid 545i
Polaroid 545
Kodak Professional Readyload Packet Film Holder
Fujifilm QuickLoad
I understand that some film packs are available but all are expired.

I do have a source for some Instax Wide b&w but have no idea what film holder can be used with the Cambo.

Thank you for educating me.
_Karl