I just bought that exact stove for that same price. Go figure. It was in excellent condition and complete except for the books. Mine does not have any holes in the jacket for a fan, just the 1 1/2" X 20" slot on the bottom and a matching one on top. The stack connector accepts a crimped 8 inch pipe, no caulking needed.
I could block the bottom slot, cut a hole in the jacket and mount a squirrel cage blower. The blowers are readily available at places like Graingers. Instead of cutting holes in the stove jacket, I think I will build a sheet metal box that fits the bottom slot and mount the blower to that. Then when I need to replace the blower I don't need to worry about the hole size, bolt pattern, etc. My home made sheet metal box will be easy to modify or just replace.
If you don't have access to a break, an easy way to make the box is to cut out two pieces of sheet metal for the top and bottom, then cut some pieces of 1 3/8 square tubing or C-channel to form the perimeter. Put it together with screws or rivets, no welding required. Mine will be shaped like a meat cleaver, where the "blade" section fits inside the stove (of course there will not be any square tubing there so the air can get out of the box and into the stove) and the "handle" section will be offset and the blower mounted on top. Then I can open the ash door without contacting the blower. If the power goes down I can simply move the blower and let it work naturally.