Like mentioned I've also only seen a handful of rubbermount Sportsters and only one 48 with a springer. Not just any ole springer will bolt up and function properly due to the frame design and the need for the springer legs needing to be offset not to hit the lower frame rails when turning. The one 48 I've seen had a springer from LedSled Customs and if I remember correctly he has roughly $2000 sunk in the conversion. No thanks. I was on a springer kick for a while but I've quickly got over it.