that's not going to work, the sport 1100 frame is 20mm wider where the plates mount. So you can machine an adapter ring( 20mm each side) if you realy want it. I don't think there are more differences, unless your pivot bolts have a different size, they can be 20 or 22mm. i agree on the looks. Maybe with some searching you can get a used pair, let them sandblast , and they are new.
And you have to make something to mount the rearframe, or change the rearframe:-) So I bet you're not going to do it.