I bought a set of "L" brackets at Home Depot and painted them to match the speakers.

They weren't very expensive, but they worked just like I wanted. I may have to make a couple of extender brackets because I may want to drop the speakers a little further from the top of the deck.

The Rat. M80s, VP-150, QS8s, SVS PC 20-39+, OPPO, Onkyo 703s, Harmony 880 Sony 60" SXRD HDTV