I need something to use as a sump thats no more then 10" wide. Basically that leaves me with a ten gal or a 15h. I thought to make my own but then found out what the cost of mats would be.
Should be able to find something that fits that bill in the Rubbermaid storage bin section of HD/Lowes/Wal-Mart. There's no rule that a sump has to be glass.
Any LFS store should be able to order you a 20XH. It's like two 10s stacked. All-Glass/Aqueon should still make them. The last one I sold, though, was like $40-$50 bucks. It was to a friend to use as a tree frog/ fire belly toad tank.