You've come to the right place.
Hey, psst...you looking for ObjectDock backgrounds? Well check out this guys gallery: http://webgizmos.wincustomize.com/ WebGizmos is considered the go to guy if you are looking for theme-matching docks. Just look at his gallery, he's got TONS of docks in there and you're sure to find that finishing touch to set off your themed desktop. He's the Dockmaster General so quite wasting time reading this, click the link, search his gallery, download till your hearts content.