FosterAndSmithAquatics.com sells hinge and backsplash, both 1/8" and 3/16" in 6' lengths, or you can get smaller pieces (at least of the backsplash) from petmountain.com
If I only need, say, a 2' piece of hinge I'll pick that up at the lfs
, but since I had to replace all the strips on a used 90 gallon and needed some new pieces for a 55 and 125 (and will have extra on hand when I need it later) it was a better deal to buy full strips and pay shipping than to pay $4/foot at the lfs
. I really should have ordered 1 each of all 4, but didn't realize that the glass tops on the used 125 were 3/16" until I had already placed the order to F&S, so I got a few smaller lengths from petmountain since I was buying malaysian wood and the shipping was free.