I had the same issue with the front fenders on my jumbo hull from Nick. I just glued them back on and reinforced them underneath with a wide strip of thin styrene and Araldite. I'll also be adding a timber shelf to the front which will be attached to the fender sides so that should add some further strength.
It's not up to the running stage yet so time will tell if this fix will hold up or not but it gets the occasional bump on the workbench and seems solid so far.