I am looking at purchasing an Otter Atv box and I already have the Otter Sportsmans rod case. I would like to be able to mount my rod case to the atv box but the case I had purchased does not have the female slide on part. From what I can tell by looking at ones that do have that mount, it seems like it is attached to the case with rivets. Does anyone know if that slide mount can be purchased independently? I really don't want to buy a a whole new box.