Custom Scenery Exchange / A Few Small Scenery Items

I'm looking for a hanging bridge type thing, half stacks (and full) of speakers (for a stage), and also, if anyone knows were to find a-well this could be long- castle feature that I cannot seem to find. Hopefully you can follow this, but it is the slant stone support that holds up balconys, and there is a cut in the rock like an upside-down U. If you don't understand maybe I can get a pick of a real castle and show you guys. Thanks-j