I think your best bet would be to find a place that will extend your current swingarm.
I know that Muzzy's does them for the 12R. You send them your swingarm, they extend it and send it back. There are probably more companies that do this sort of thing.
I know that Muzzy's does them for the 12R. You send them your swingarm, they extend it and send it back. There are probably more companies that do this sort of thing.
