I have built 4 stands 2 for me and 2 for a friend of mine, 3 55 gal and 1 29 gal.
all I did was biuld a 2x4 frame with 2 dividers in the middle and then wrapped it in 3/4" Oak plywood and stained it. I found no plans for this, I just biult them from my head, I will send you some pics later...