You do know that BPA-free just means they use BPS or some other bisphenol plasticizer, right? Right? Because all of the research was focused on BPA and nobody tested BPS even though they're quite similar chemically.
You just can't polymerize plastics without a plasticizer. It's just not allowed by chemistry. No free lunch.
If you want something that's not going to leach huge amounts of plasticizers onto your fingers, use an inkjet or a laser toner printer or a laser marking machine.
They don't really make those for receipts, though, because fingers tend to be wet and powdered toner is expensive.
How is the average reader to know whether you're an entirely average person or an eight-sigma indoors dweller who never goes hiking, never asks another person to take a photo of you, never does any sports...