I had a similiar problem on my 4t6 but my
fenders were mounted. They looked like they were driven through a door equal to the tire width. I hooked a tiedown/come a long and snugged it up and with a couple of wacks with a rubber hammer they "rebounded" close to where they should have been. I see by your pics that your fender is not mounted but if you could secure to a solid surface it may be a possibility. The cracks could be welded.
Dan
