Hey guys check out Buckmasters they have a link to devices for such situations
I was there looking for ideas for a crossbow holder for my son and they have all kinds of stuff. Try
http://www.residents.bowhunting.net/...ers-guns2.html This is the address of the page I was on but its linked off of the buckmaster page they have rigs for guns and bows good luck I' m getting my boys bow holder shaped up nicely it mounts on a camera tri-pod we will be shooting this coming week. The same links come from
www.badf.org good luck