They're definitely getting harder to find lately. I just sold one...then tried looking for one, on behalf of someone else...and haven't had much luck. I did see a few posted over in the Facebook "Crown Coach Junkies" group, but the ones they posted recently seem to need some work or are in questionable running condition. My suggestion would be to A) Join that FB group...and B) Have cash and be ready to pounce when you see the one you want.
also be ready to travel to get it.. no idea where the OP is but east of the rockies crowns are even more rare to find.. so be ready t ogo west to get one.. many of the ones I see around the east are not in the greatest shape as people brought them from the west with no idea how to care for a detroit engine..
I briefly entertained getting one but all i found were ragged out gutted shells and i wanted one with seats