Can anyone send me a link or list off all of the available red dot sights for the SuperNova? It would be greatly appreciated because all I can find is the Burris Speed Bead Red Dot Sight. I want options, they have to be out there...I hope. Looking for an inexpensive one because I already have a red dot sight on my 870 but I want to put one on my SuperNova (temporarily) for my upcoming black bear hunt just to get a big game animal under its belt. Thanks in advance.