I have a BajaRack and that comes with a Jerry Can holder as option. Here is the link:
http://www.bajarack.com/land-rover
and all the accessories that fit the rack:
http://www.bajarack.com/accesories-page
it's a pretty good solution: base frame that mounts to the rack, can holder on top that ties down the cans with a flat steel bar between the cans. Rock solid...
These guys at BajaRack are really nice...
Nice Rack :victory: whats the price good not find it on their site.