You can find the Phase 5 90 Degree Ambi Safety Selector (SAFE-90) Black here.

The Phase 5 90 Degree ambidextrous Safety Selector (SAFE-90) for AR-15 and AR-10 weapons is an easy replacement for the Mil-Spec safety selector. The easy installation requires no gunsmithing or special tools.

Color: Black
Features:

• Drop-in Ambidextrous replacement for standard Mil-Spec safety selector.
• Wide-designed levers for ease of use.
• Levers are precision CNC machined from lightweight 6061-T6 billet Aluminum.
• The center core is precision CNC machined from carbon steel and then heat-treated.
• Fits AR 5.56/.223 and 7.62/.308 receivers
• Made in the USA.