V-Mount P-Tap solution for a7S ?

[L1N3ARX]

I'm looking for something pretty much like this: http://www.bhphotovideo.com/c/produ..._camera_wc_181200_v_mount_plate_for_sony.html

But I'd much rather just use the V-mount plate I already have, and simply use a dummy battery adapter to P-Tap cable.

Anyone have a v-mount solution they've come across?