I thought I would pass this on to anybody who has u-rigs. A good holder can be found at Lowe's for $6.17. It is a Rubbermaid Keepsake Photo & Media Box #4487.
18" x 9" x 6.75". You can find it near the indoor trash cans. It will fit 2-4 rigs depending on how tight you want to stuff them in. I think it will decrease the tangles they cause with other things when they are not being used.
Kerry