[Lordstan]

Originally Posted by Forever Young

https://www.ebay.com/itm/Itoya-Art-P...-127632-2357-0

I have a ton of these. They fit nicely stacked in large safety deposit boxes as well.

I have been using these for a while as well. They work quite nicely, but I also go a second level of protection by using Mylar comic sleeves for their inertness.
https://www.ebay.com/itm/39387302462...MAAOSwTf9h4fWm
These come in different sizes. The 4 mil versions are nice and thick