I have alba racing nerf bars on mine. they have full heel guards and look really good in my opinion. the only thing i don't like is that the kicker hits the heel guard when you kick the bike over.
http://www.ebay.com/itm/Yamaha-Banshee-YFZ-350-Nerf-Bars-Pro-Peg-Alba-Racing-Black-Red-207-T7-BR-/191753025265