I keep my AT853s, Church Audio preamp, and R09 all in a $3 plastic pencil box I picked up at the local drug store. The preamp and R09 are velcroed to the bottom with a very short cable connecting them. The mics fit snugly on top in a plastic bag.
I also dremmeled a little hole in the box so I can run the mics in with the box closed (I use a little extension cable that came with my iRiver that has a very small plug, allowing for a small hole). This yields an almost waterproof, almost crush-proof case that can come in handy in crowded bar situations.