I'm sure this has been discussed before. I've been living with them for decades...
Good ones (left side):

My most recent "fix" (right side):


Not so bad, but it is a pain to get to the top fasteners to keep them from rotating. I've also used fillister-head bolts.
I have no welding equipment nor skills, or I would weld the bolts in place.
I wonder if JB Weld would work? Put some under the heads of the bolts and then surround the joint between the bolt head and the stripped out body nut.
What do you think?