Where to get thin mylar(?) coin baggies?

[Oxford_Collector]

Hi - I was at the London Coin Fair today (and picked up some nice coins, but that's for another thread) and noticed that a few of the dealers had some of their nicer coins in thin, clear, but crinkly, open-topped baggies (perhaps Mylar?), that could be folded right around the coin. I was thinking that for my BU coins, this kind of thing might be a good idea, as would protect them from casual handling, but the coins would still fit easily in my coin trays, and the coins would be easier to pop out for direct handling than the normal thicker plastic pockets, where there's perhaps risk of wear/scratching sliding the coins in and out (and I'm paranoid about PVC damage, though I know you can get non-PVC pockets e.g. polyester).

Any I was wondering if anyone knows what I'm talking about and where I could get such items from? Thanks!

[Oxford_Collector]

Anyone? I've not seen these for sale on here, for example, but they must exist somewhere!