If you are in Europe, KameraStore is also quite nice (based in Finland). Bought my first DSLR with an extra lens and a few accessories for a nice price from there. Also, they inspect and test every piece of equipment (secondhand) so you have an added piece of mind.

Good to hear, those are silicone based as far as I know. Not totally risk free but much much better than the alternatives.

You might actually not be better off with parchment paper, it is nonadhesive thanks to fluorinated compounds (PFAS) or silicone in most cases