Generic cage that fits the A7s- suggestions?

[M. Gilden]

I'm tired of buying cages specific to certain cameras. I still have cages from cameras I don't own anymore, for example a GH2 cage that almost perfectly fits the A7s. But the battery cutout is too specific for the GH2, and is therefore useless for the Sony.

So, instead of buying a Sony-specific cage, are there any generic cages that people have had good experiences with an A7s? Something that would at the very least let me pop out a battery without removing the camera?

 

[caseywilsondp]

I used the camtree hunt swift cage. It's made for the older black magic cameras, but I pretty easily adapted it to work with the a7s. I bought a separate quick release for it as the included one is crap. A couple pics on my site:
http://caseywilsondp.com/2015/02/10/sony-a7s-and-atomos-shogun/

The matte box and follow focus were not included.

 

[Bern Caughey]

Hot Rod Camera, Wooden Camera, Walimex, & SmallRig, offer 1/2 cages that can be used on numerous dSLR, & mirrorless, bodies. Biggest issue is they attach to the hot/smart shoe on the top of the A7 series cameras so can't be used with Sony's audio modules.

EDIT: Hot Rod Camera's Kung Fu Kit doesn't attach to the hot shoe so may accept Sony's original audio module.