I have heard of people retrofitting bags from a ST series on a Supersport but I would thing you would need welding skills to do so. I also would worry about width as the ST hard bags are wide, excellent but wide. I would put your energy more into getting a rear trunk mount. This would keep the bike more narrow and though the weight would be high and rearward , less than a passenger. Easier wheelies as well.
Look at nonfango , givi or hepco & Becker (sp) to see if they have one.
Look at nonfango , givi or hepco & Becker (sp) to see if they have one.