Not sure, but I think we have a little confusion here. Julie is looking for "inlays" to purchase. I think she has confused "inlay" with "inter-lace" or knot work. Julie, most folks use some kind of paint rather than a true inlay which involved carving a channel and inlaying something different into it (such as a different color of wood or mother of pearl)

There are lots of internet sites and design books that have patterns you can use. The real trick is not going blind when trying to follow a ribbon to color it in.