Teach yourself, it'll make the overall experience all the better, as well as give you actual experience. Buy a couple of busted 3DS' online real cheap. Then, start experimenting. Crack them open, mess around with the case. Sand it, Epoxy. Here's some advice you may or may not want to take. Take some of that plastic from the cases, superheat it (torch or something), when it becomes moldeable make it into a circle a tad bigger than the actual size you want it. When it's nice and cold, start drawing the design on that piece of plastic. Cut out excess plastic. Once you have the circular design, make it into a mold (so you can reuse it for future use). This process is cheap and not hard to learn. Just google it or watch a 5 minute video on Youtube. Get the mold and create the shape. The mixture usually makes it a rubbery substance which is exactly what you want, (or I'd want anyway). From there just round it off and thin it. Use epoxy or something to put it on the case. You could try using a drill to cut a hole if you want it to be flush If you just want to paint it, and not have it be another physical thing, just try to get a 1:1 high quality print on adhesive paper and gloss it over. Sandpaper, before and after. I'm making this up as I go along. It shouldn't be too hard. Start by getting a few broken ones first and experiment on it.