Need ideas for mounting rear center speaker

My Pioneer AV receiver is equipped with a rear center channel, but until recently I had no speaker for it.

Now I have received a new Klipsch center speaker, and I'm eager to hook it up. However, I'm going to need to hang it from the ceiling - the room really isn't compatible with any other sort of mounting in that location.

The speaker, however, is not equipped with any mounting sockets, bolt holes, etc - it is designed to sit on a shelf or atop a TV.

SO - I need a mounting rig that will attach to the ceiling and provide a level horizontal shelf with about 8" of vertical clearance, about 7" deep and 20" wide.

So far my searches have turned up nada. Anyone have a suggestion?

I guess I could always build one, but if I can find one ready-made it'd be better.

Into the mud, scum queen!