That brew pot looks like it would work out fine. As far as opening up more posibilities for kettles for you, you could try something like the picture below. I just took some drilled angle iron and cut it to size and bolted it to my burner stand in order to make a bigger surface area. it holds up my keg great. also I can take it off and still use it for other size pots.
"Yes, I am a pirate two hundred years too late. The cannons don't thunder there's nothin' to plunder,
I'm an [under] forty victim of fate, Arriving too late, arriving too late."