I have a couple questions that hopefully someone can answer. I bought a 2018 ZR 7000 129” and bought a tunnel bag for it part # 7639-283. When I opened the bag to mount it it didn’t have any hardware with it. Do these usually come with hardware or do you have to order it separate? Also the tiny excuse for a tunnel bag that it comes with is riveted to the tunnel. Do you mount the new bag over the small one or do the rivets get drilled out? If the rivets get drilled out what’s the best way to seal up the holes to prevent corrosion? Thanks!