Newbie question

I'm pretty much blown away with the amount and variety of stamp collecting
supplies. If you guys don't mind, I would like to ask a few questions from
time to time and get your input.

My first set of questions a

I have a set of album updates that have two holes that are 18.4 cm center to
center. If anyone can steer me to a two post type binder that will fit
these I would be grateful. (Harris is a bit too narrow).

I once thought I saw an Air-Tite type of holder that was made for stamps.
Does anyone know about these and where they might be obtained?

Thanks for your help.
Brian