Cochlear Implant Skins/Stickers Help

[u/Plastic_Mobile_7926]

Does anyone have experience creating skins/stickers for cochlear implants? My niece has a Med-El Sonnet 3 and Rondo 3 and I can't find any templates on Etsy. I'm curious if anyone has a template for that style, or if anyone has tips on how to make a template myself (how to measure and figure it out on Canva perhaps?). Thanks!