Cast repair may be needed.

[Agroshield]

You might consider laser cutting two profiles, one for each side, and somehow joining the two together , riveted, or whatever....

That is a good idea. Cut the slots at their biggest and then make a half-depth infill piece. For the two outer ones, you could drill through from the side and pin them into place. The centre one might be more tricky. Maybe loctite would be good enough. Or Dutch key from the face side and file smooth.

 

[ukracer]

He’s welcome if he want to.
I dare say I’d pay for one in steel.

You could always ask him!

 

[Exuptoy]

A mate of mine has a water jetting business and can jet up to 2” thick. I’ll probably pay him a visit but at the moment there’s no rush now.