Tool rest holder (banjo) repair

While I was trying to turn down a blank I cut out of a log I broke my tool rest holder. It is a cheapish lathe but functional and the holder was cast iron and it snapped down the center. When I held it together I noticed that the base of the holder was twisted, whether it twisted before it broke or it was always twisted I do not know but I had all sorts of issues securing it so I suspect that it was twisted before it broke and just not noticed it.

I still have the parts and I have a MIG so my thought was to fabricate a new holder from the remaining parts. Anybody done this or have any suggestions?

John