A fast easy fix for me was to buy toilet tank washers and larger metal washers. I took each of the bolts out one at a time and replaced the stock outside metal washer with a bigger one, then added a rubber toilet tank washer, then put it back together. The inside of the factory grommets is in great shape. It is just the outside that is coming apart. I found the toilet tank washers in 4 packs at Home Depot.
I did try to order the grommets at my local Honda dealer first. All he could get was the whole bracket assembly that holds the split windshield to the roll cage.