I've been looking around in Auto Trader and other listings. I've been interested in a white Bonneville with a pewter interior. I might pick one up in the next year or so as a second car. Definitely looking for at least an '02 or newer (perhaps even another GXP). What strikes me as odd is that any I've come across all seem to have the taupe interior. I really do prefer pewter and won't buy one if that is my only option.

Does anyone know for sure if this colour combination was available?

yes Darcy it was available, i am also looking for another Whitey, but 99% of them have the Taupe....

i have seen 1-2 that have had the Pewter

saw one here in northern ohio.
white with/charcoal interior (ssei)
good luck in your hunt!

I looked for months for a white with pewter GXP and had no luck. When I started looking at black GXPs, at least half of them had taupe interior also. Yuck!

I once changed out the interior of an Olds Cutlass Supreme from red to black. Had to
remove the red dash and everything. It was a job but turned out nice.

When you own a car, the interior is what you see most of the time. It needs to look right...IMO.