have you tried looking for some used ebay units?
in the meantime--- if you will replace--- you may want to just drill a hole on the bottom of the lamp to drain water...
and then search for a replacement lamp at a reasonable cost.
2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.
2013 Equinox 3.6L - 60,000
2010 Traverse 3.6L- 128,000
2003 Trailblazer 4.2L- 180,000