I dropped the hinge bolts inside the body, any help retrieving them?

So I was taking the hinges off my car to clean them up, and I dropped one of the upper hinge bolts between the inner and outer body panels, apparently didn't learn my lesson and did the same thing on the other side. I have tried magnets and a grabber tool, but I haven't been able to retrieve them. I am sure I am not the only one out there that has done this, and of course I could go buy a couple bolts, but are there any tips out there to get these bolts back, or will they just live there forever now?

Thanks in advance to those that can help.