And figured someone on this board has done this.

I got a little Marlin 70 "Papoose" that I want to strap under my rear seat, but I am having trouble figuring out the best way to do this. I am trying to find some velcro straps to put underneath the seat, but coming up goose egg. I have seen the under the seat racks but with the sub, they won't fit. Any suggestions?