@jedergithub.com/Ralim/IronOS any of the ones listed here I can recommend. I got the TS100 and it's small in the hand and handles has stable temps, even on bigger ground planes. There's a bunch of clones going around based around TS* but I'm not sure which ones are compatible.
But you can also just spend 30€ inc. shipping on one of those, and while you can't upgrade the firmware they'll still be able to connect to most power supplies you have around and soldering much better than the single temps ones.