A DIY one! trust me, a homemade stand of 2x4s is much better quality than most or even all store brand ones. As long as you make it with good structure it will support a very heavy tank (considering the length by width fits the tank)
I have my own built stand for my 29 gallon and its much better IMO, I just wish I had made one with shelving but I'm not much of a builder.
I do think it's a skill young-uns (and not so young-uns like myself) are neglecting. I told my dad the top of my tank was annoying me. He's building me a home made lid and lighting unit for Christmas. How amazing I am jealous of him sometimes! To round it to the topic... my dad built one of my stands, well I wanted a table like stand so he modified one of my tables to support the weight... genius! (I on the other hand have been living with no wardrobe or drawers for 2.5 years.... as they are still in flat-pack boxes under my bed - my excuse is that I am waiting for a carpet, but that would mean figuring out how to dismantle my bed and then like putting it back together....)
I sweet talked my dad into a new homemade stand for my 36 g so I can start setting g it up. I'm pretty sure I'm taking it home tomw, but I can measure and take pics if u need more samples for ideas. I asked for this one to be really strait forward and simple, strong as possible with a shelf for the air pump (I love check valves!). The next one is going to hold 3 tanks in a horseshoe to replace a weak table. That one is going to be all him and woodworking kniw how
There are plans all over the internet for building a bunch of different stands. Here is a link to an online generator that comes up with some basic stand plans and a video which goes into pretty good detail for building some sturdy, basic, stands. I will be building one later this week for my 29 and sump in a raw form, but no measurements yet.