j, they make speaker stands, including center speaker stands, with the top plate smaller than the speaker so there will be nothing on which the sound will reflect. Actually, Even though the top plate is smaller than the speaker, it is strong enough to hold the speaker.
Here is one of the largest top plates I've seen on a center channel (16" x 8"), and it would hold the VP150 just fine. It has 4 small rubber pads on the top plate which help isolate the speaker and hold it on the stand.
You don't say what height stand you are looking for, but the one above comes in
12", 18" and 28" heights, $49 to $59.
