Thanks for the comment, Hamish. If it were me I'd be trying to rescue those Land Cameras from your mate before they end up in a tip somewhere. I have at least 9 now. Got my most recent acquisition--a near pristine 103--a couple of weeks ago when out walking the dog. Somebody was selling it for $2.00, a deal that I rapidly agreed to. When he handed the camera to me he said to me quite seriously "Thank you for taking this off my hands." I nearly choked holding back the laughter, but I limited my response to a polite thank you.
Polaroid no longer makes film for them, unfortunately. But Fuji makes colour and B&W. (You want "FP100c" for colour and "FB3000b" for B&W. There is also an FB100b, but Fuji recently stopped making it I understand.)