Using Ward's Automotive average annual scrappage rate of 5%, my guesstimate would be somewhere around 30-35K still on the road in the U.S. and approx 10-15K in rest-of world.
Difficult to quantify factors like the cars spent a lot of time on dealer & storage lots rather than being driven, the car is more of a toy than a DD with the requisite winter storage and the fact that many are totaled by insurance companies due to unavailable or outrageously priced body parts.
The actual Crossfires-in-operation counts are available from a couple companies here in the U.S. for a fee.

See below thread for a 2009 U.S. baseline:

https://www.crossfireforum.org/forum...cles+operation