Having some one tig weld SS is the way to go, if you know anyone.
I used to drive some food grade tankers and all the exit plumming was done in SS.
We had a SS cap that a SS and a bolt came thru with a wing nut to cover up the unloading pipe. This way no road trash could get in the pipe and contaminate the product comming out when it was off loaded. A guy at the wash rack put a wrench on the wing nut and tightend it till he snaped the bolt off. I had to drive 2 hundred mile to find a guy with a good tig that could weld it back on. And that was in California at 55mph. thats like 4 hours because of this dumb a__ , I wanted to ring that guys neck at the wash rack. HE! HE! HE! Kurt