Where can i find a remote control duck decoy?

i am thinking about buying a remote control hunting decoy. i have seen there in calbelas for 100 bucks and the reviews are about half and half. also the range is not very far. i wanted to make one out of a remote control boat and a decoy but need to find a small boat that would fit under a decoy and has high fequency. does anyone have one of these and can tell me a little more aout them thanks.