I think mine will work just as well as those and they are a lots cheaper. I got 2 radio speaker grills(got Lucky and found some metal ones)to run on mine.They come in all sizes,just drill a hole in the middle and bolt them down. Check mine out & see what you think.

PS The man at the stereo shop down the road give me mine. Most stereo shops have some laying around or can order you most any size you need.
""CHEAP""