Factory bars are threaded, not hollow. You will have to pull the throttle tube out of the old grips (or do the R1 mod).
Look OEM to me. Put the grips on without glue an see how they fit. As far as your bar ends go, just go to the hardware store and get the bolt you need.
The
The grips fit perfectly, the only issue is the ends at this point.
Question - when putting the grips on the bars, should the grips outer edge line up with the end of the handle bars?
I ask because the ends came with a large-ish spacer which seems like the grip should slide over.