Well I was a little late on seeing your post about the rubber washers, but I went a head and got some over sized washers to use with some quarter inch screws i already had at the house that fit perfectly in the rivet holes.
Popped off the rivets and used the existing holes in the strap and screwed those puppies back in.
It's not the prettiest thing in the world, but I have a feeling that strap isn't going anywhere any time soon.
Also, I did look into the rivet solution. Not bad, but I figured I could fix it for $0.39 by just getting the washers vs the $30 some odd it would take for rivets.