I've just started making a stand/cupboard for under my 65L/15g tank.
I'll post a pic when its finished. I assume most stands would be for a lot bigger tank than mine but I like wood work and it gave me something to do.
Well here is a build i found a while ago(forget the site), and has been working on my 180 gallon. It is severely over built so I can trust it. It should be adaptable to any size that u need. SOrry i didnt take pics when I was building mine, but I can answer questions if needed. Its built out of 2x6 and 2x10 pine.