Depends on how saturated you want your wig. Arda's Aqua and Powder Blue shades are really nice, but the wig selection is limited. Here's a more vibrant Epic wig
, which would need heavy styling to work. This Five Wits wig
might work, but it's a bit more teal than what you're looking for. This Moe Mall wig
might be the closest thing. Final option is to dye a wig that's the correct style. Something white or silver would be best. Hope this gives you some ideas!