Could use flat stock to make wider bolting. Drill 4 holes. 2 for the original bolts and 2 wider and use a 2 HOLE EMT STRAP (found at any hardware store for under a buck) Would have to cut the original bolts down. With a slight kink in the middle
You would need a drill and hack saw but a very easy fabrication. For illustration; Amazon.com: GAMPAK 2 HOLE EMT STRAP Used for providing support: Home Improvement
Just a thought and hope it helps.