Boomer573

I noticed that one of the luggage racks was not fastened against the roof securely. I took the bolts out and the rubber compression thing has fell apart. I contacted the local Jeep dealer and said he could get a few (like 2) of these for $5.31 per. They said this was US stock and could not get any more. I don't want my roof to leak and rust. Any ideas? It measure a little more than 1/2" hole. The bolt acts like a compression fitting, creating a water proof seal. Is there anything else out there with the quantity that I need and a lower price?