multiple device mount?

Hi guys,
I just purchased a kayak from a NCKA member and he threw in an X4 FF.  I also have a Garmin 78sc and an Icom handheld radio.  I will use the kayak as a dive platform and I would like to mount all of these devices just aft of the hatch.  I can't seem to find a mount that would allow me to put 3 devices on the same base.  Do they make such a thing?

Thanks

what I did was just add a ram ball to the frame of the fish finder and then add on from there no one really makes amount that holds all three except for Scotty

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Nice.  Thanks for the pic. 

Since I'm going to have all three on one base, should I use a larger ball at the base, or is a 1" good enough?

The VHF I would attach to your PFD in someway. 

If you get separated from your yak in a different situation other then when you our diving you will wish you had it.

After a lot of searching, it looks like it will be much more economical using separate mounts.

Thanks

Scotty makes a triple. They sell them on Amazon. Like Ryan said, VHF should be on your PFD.