coil stowage

Heading off again for probably last big trip of the season and taking a few extra coils along.I was just wondering how others store their coils to protect them from damage whilst travelling.I see on e-bay they have coil bags ranging from $40-50 but was looking for a cheaper option besides shoving them all in a plastic crate.Has anyone designed a rack of some description that they could slide into maybe?.

Cheers

Phil