With an FL it's not jsut a width issue......the mounting points on FL struts are different. Early DYNA's have the same mounting points and spacing as a softtail. I'm thinking a bracket from a Heritage softtail could be fabbed to work.
I just went on eBay and tried to find a jackyl bracket, and had no luck.
If it were me, I'd look into a tour pak bracket for a heritage softtail, and be prepared to do some fabrication.
If you are shy of fabbing....then we have problems.
I'll try to help ya....but I'm not too used to helping guys, because when it's my time to get help back.....I don't get shit. (Todd and Bry aside)
But, I can tell you need a hand, so until you piss me off, I'll help.
~Joe