How confident are you in welding?
You could drop the engine out, repair/replace the subframe then build a new turret, I did my old AX GT and at the same time re-enforced it with angle

lol
You COULD change the inner for one from a breaker yard if you can get one cut out? i spose as long as its a good job and its safe your all good.
Or hide it for the MOT, but its a safety check and its on your own arse if it snaps/goes further and someone gets hurt.