I can't find the official Casio thermal paper (TRP-112) for the FP-40 printer anywhere. Is there a good substitute that's available in the USA?
The dimensions are Width: 112mm Diameter: 30mm
I have found by searching for the original part number, i.e. TRP-112 a site will pop up selling an equivalent and usually they will list a range of printers that paper fits. I also think Casio was fond of Seiko printer mechs so if you can cross reference to the Seiko number you have a good shot at finding paper.
This link is selling it by the case which is not what you want I guess, but they do show Seiko numbers:
https://www.possupply.com/112mm-4-3-8-x-...p-0112-025
Seiko STP411
Seiko DPU411
Seiko DPU414
Seiko DPU3445
Using the 'Seiko DPU411' as a search term on eBay I found:
https://www.ebay.com/itm/393692535742?ep...SwJX9iOcPm
Note they give the Seiko number of: SS112-025A which expands the search further.