I see you haven't had any responses. If you are still looking, I have an 8 gallon Megapot with lid, no ports. It's not an "old banged up" kettle, but let me know if you are interested. $75 plus shipping.
Appreciate it. I eventually got too scared so I decided to upgrade to Tri Clamp dumps via 1” pickup that has mostly resolved my needs. Still wish I had that bottom dump though ... one of these days