Ok good news! The Rock Auto light bulb sockets fit! Theyre also interchangable with several models of car too so i'll post that in a thread about interchangable parts for dashes
Here's the part number AIRTEX Part # 6S1037 cost is $4.04 each
www.Rockauto.com
I found LED lights that work perfectly too. See this thread.
http://6066gmcclub.com/forum/showthread.php?t=47541