The rears are easy. Ironman, Supersprox, and Moose all have them. The Moose is the least expensive at about $50, it's aluminum and seems high quality enough. The Supersprox is about $80, the Ironman $130. (all retail pricing)
The front I have not found a crossover for, but I know that Talon and Renthal are both available, only through the dealer. I can look up the part number on the renthal package I saved at home and post the part number, but I don't know that you'll be able to get it directly because they don't list it on their site. Fortunately the front sprocket is fairly low price, even at dealer cost, though it is double what you'd think.