Generally, most Vinyl cutter software has instant conversion from bitmap to vector graphics. Either through the Aquire command (to use a scanner) or the Open command to choose any type of graphic on the planet.
So Royalty Free Vector Graphics are not really necessary after all. Besides, vinyl cutters don't have the accuracy required to handle really fine Vector Graphics.
- Sample of "Free" Vector graphic site: Must buy one time RF licence
phones: www.clipartof.com/new/clipart/1
clipartof.com/details/clipart