They sell sideburns on amazon.com. They are adult, but I would bet you could trim them. Not sure if they stick on, but it says they are reusable, so maybe not too rough on the skin! I miss dressing mine up. My favorite year was when they went as M and Ms. Have fun! http://www.amazon.com/Private-Islan...d=1350039703&sr=8-16&keywords=sideburns+black
I saw sunglasses at Target with sideburns attached- just fuzzy material you could probably do youself with felt and cheap glasses from dollar store-
JMO because I'm an Elvis fanatic lol, Elvis didn't always have sideburns. He could still look like him with the hair and costume!
I bought a moustache last year and cut it in half...sideburns! I also think Party City carried a pack with the moustache and side burns.