They might be similar to some of the HD Duce risers I have seen with a small shoulder around where the stud is. I think some HDs have a recess in the tree the accepts that shoulder. There are plenty of others out there for much less money that don't have that and look much better to me. I don't really like how square those are and plain. I put a kind of square set on Wendys bike that sit flush and have some nice accent machining in the sides and are narrower at the base than the top giving them some shape.
Here is what I did on mine, more my taste.
But if those risers are what you want it would be easy enough to trace the base on a piece of stainless just thick enough for the shoulder and cut a spacer with a hole drilled for the shoulder to get rid of the gap. Not sure thats whats going on there but thats what it looks like to me.
I learned all I need to know about life by killing smart people and eating their brains. Eat right ,Exercise ,Stay fit, Die Anyway!
