like BB suggested shop around. You may even find them at one of the supporting vendor sites. I was looking for some hardware that was left out of my e-bay purchase. I spent some time at the Home Depot in their wonderful hardware bins that area always organized and found what I needed. You really can't beat the knobs for the bed extender though.. wouldn't be the same with a fastener, that is for sure. There also used to be a company called HELP that sold all the odd ball pieces that are hard to find for your car, interior clips, handles, things of that nature..