"An ATX Case Case" (yeah you read that right)

[Static_11]

actually...

somewhere, i don't remember where, i found a "harness" so to speak...
2 straps wrapped around from top to bottom and two straps from side to side..
like this kind of.. imagine a case inside of it:
#

then a strap went across the top and there was a handle on that one.

the straps were adjustable for different sized cases.

 

[Apokalipse]

I have one of these:
Deluxe LAN Carry System

I'm sure you could find something like it if you live in the US