This design is pretty easy to customize. You can do something as simple as removing the circle and replacing it with an engraving. You can crop that entire half of the design and create a whole new function or form, keeping only the clasp part.
MDF works well for this product, its durable and comes in many colors, but this could also look good in plastic or a premium wood material.
Use a 1/16" endmill to cut the design. You can cut one file, or easily batch this and cut dozens out of one sheet.
Use this EASEL link
Matthew Kent Huddleston