Amazon.com: Star Wars The Black Series Phase II Clone Trooper Premium Electronic Helmet, The Clone Wars Roleplay Collectible, Kids Ages 14 and Up : Toys & Games
Lego Accessories Star Wars Helmets Clone Army Customs P2 Sun Visor
1/6 Scale Phase 2 Heavy Clone Trooper Helmet Blank for Custom Figure Fits Sideshow Star Wars Figures - Etsy
LEGO Star Wars - Black Armor Pauldron Visor Kama Plastic Clone Trooper Minifigre | eBay
I know there's lots of mixed feelings about the holes, but I'm gonna be honest they look great and have fairly accurate positioning with the visor piece, though the rangefinder needs improvement :
Star Wars 1/6 Clone Trooper Phase 1 Helmet w Visor Blank for Custom 12" Figure | eBay
Clone Army Customs DETAIL VISOR for SW Minifigures -Pick Color! P2, RP2, OR | eBay
ARC Clone Trooper Armor Accessories 3D model 3D printable | CGTrader