Did either even offer a solution for your needs? The first fastener place I visited (Fastenal) Didn't have what I needed and made it seem like I was asking for a bolt made on a different planet! I'll never take any business to them again. Since you can't find them locally I'd be ordering from the online retailer
@Ayune mentioned earlier.
I'd say the bolt holes have been modified, I'm sure your thinking the same thing.
As for the bolts, those look like the factory bolts. The left would take two of the shorter bolts and the right would take two longer ones. The right had an additional tow hook that required longer bolts.