1999 envoy headlight ?

I have a 1999 GMC Jimmy with the Envoy package with the HID lights. The low beam bulb is burnout on the passanger side. The dealer said it would be $400 for them to put in a new light. The truck is 9 years old! Is it possible to use a conversion kit and just swap out both sides. Any suggestions on how I can save $$ on this one. Many thanks

Chris