Cody, seriously ... what's a Serio 5000 for? The antennas I'm mounting are for two-way communication. They need to be clear of the cab so the signal can "get out". The only body mount that would work would be on the cab and I'm still not happy about putting holes in my truck. I'm thinking about getting an inexpensive headache rack. I don't load up the bed with much stuff very often and its always secured well. So I don't need it to protect the rear window. It would however be an ideal place to mount the antennas, and perhaps some lights if I get to that point.
I have one in mind, but I'm sure the guys that know anything about them, would get a chuckle if I mentioned it. I've looked at the "good" ones but the sticker shock took my breath away. I'll have to modify anything I put up there to get exactly what I want. I just can't see spending a bunch of money on something then cutting it up.
I just Googled "Serio 5000" and the only thing I came up with was a printer. I'm sure that is NOT what you are talking about.