Pulled the 'burb out of storage today while the truck is in the body shop. Paint RPO codes are as follows...
41U Exterior Color, Primary, Black
51A Stripe, Color Accent, Two Tone, Gray/Silver
96L Exterior Color, Secondary, Silver Metallic
Probably a silly question but I'm not sure what those longer codes you posted are, are those located somewhere else? Plate on the body somewhere?