David ,as I mentioned sometime in past on PCB posts ( for which I am grateful for your input in bringing my methods up to date ), HOBBYCRAFT sell packs of ( from memory ) 5 sheets of film for use in inkjet printers . It (AFAIK) idntical to that you mentioned in that it accepts inkjet on one side . Price- long time since I bought any ,but (again from memory) less than £5 .
ETA -PRICE IS £3 per pack of 5.
https://www.hobbycraft.co.uk/stix-2-...ntable+acetate
Storefinder
https://www.hobbycraft.co.uk/storefinder