Vans reply
here is what Vans support suggested by email;
Here are a couple of options to try.
1. Depending on how much larger the hole is, you can still get a good rivet
to set in there. To do this, choose the next longer dash # rivet than was
originally spec'd out. Slightly 'Pre Squeeze' the rivet using your hand
squeezer before inserting into the assembly to shorten it and increase its
diameter. Insert the rivet into the assembly. It should now fit snug. Finish
setting the rivet as normal.
2. Substitute a screw, nut, & washer in the assembly. It will be stronger.
3. Increase the rivet size up to a 5/32" rivet (AN470AD5-x). We don't carry
this size.
4. Only use a blind rivet as a last resort.
Hope this helps others
Shiney