It's the part outlined here, I think he said it's the frame. I'm not quite sure if it's the entire part in green, or if he wants just red part, but I think it's welded to the green.
This part is bolted to the lower control arm with purple bolt/nut.

I remember him saying something like he needs the frame in front of the steering box (or something like that). Does that make any sense? (Obviously I need to talk to him again and get it clarified).

Sounds like he's saying he needs to chop a piece of the frame out here out of mine, including the vertical piece (green) that's tweeked, and get the same chunk from a donor and he'll weld it into place, and then bolt it to a new A-arm.
I'm way outta my league here, so I have no idea.

Sounds like it's gonna cost a fortune - - -

I need to check with the VXers that have spare part trucks, see if they can "cut" this piece out for me - - - anybody have Rent-a-torch handy? etfren, Jo, vxfocus ??