3D Printer suppler spool spacer adapter

I love this design for holding all my UP! (PP3DP) spools, I print them scaled down 99 percent, I now have over 30 of them and the number keeps growing.
When I bought plastic from Amazon I needed an adapter to fill the counter bore feature on one side of the spool and this is it.
http://www.amazon.com/s/ref=bl_sr_office-products?_encoding=UTF8&node=1064954&field-brandtextbin=3D%20Printer%20Supplies