That was someone else's work.
The floorboards I installed are standard Kuryakyn with spline adapters. I believe the same as for the VTX. Total cost around $100-$125 iirc. Easy to install.
If I rest my toes on the end of the board my foot is about 3" further back so there is a lot of room for moving your feet while riding.
This space reserved for something witty.