We have all been in the situation when you have some expensive electronics that you need to pack in a bag to take it on the road. Often there are not enough padded separations available to allow you to place one item in each section. There are a few options, you could use some bubble wrap, a few towels, some cardboard. The guys from Deadly Computer Blog have come up with an interesting idea. They used spray foam to make custom foam molds to hold the equipment. I have seen this same procedure used by shipping companies that ship large heavy electrical/mechanical items.

Thanks Stephen.

"We choose to use some Great Stuff foam insulation as the insulation, and zip-lock bags as the containers. Because that foam gets everywhere, and never comes off, I didn’t take any pictures of actually spraying it in, and stuff like that. We used soup cans to stand in for the camera lenses, because again, that foam gets everywhere. As it turns out, a soup can is the perfect diameter and height for the Nikon 18-55mm VR, and 55-200mm VR lenses, for the 55-200mm, we added a can of tuna to the top for some extra height, as it is taller."