The Viper Store from what I understand didn't do any of there own research, they copied from other sources (learned from a reliable source)
When I was looking at the Viper Nation some time ago, the numbers they displayed seems to coincide with the USA market only
Not saying anyone is wrong, because I have no idea how they actually came up with their numbers
I can only say what I have because I personally did the research.
For example, 1997 there were 1787 total, 1670 GTS and 117 RT/10. 1017 GTS Blue/White 964 GTS, 53 RT/10. 770 Viper Red, 706 GTS, 64 RT/10. I have the VIN for every single one of them
Also for 97, 1553 were US market, 1456 GTS, 97 RT/10, 118 Canada, 98 GTS, 20 RT/10, Export (other) 116 GTS. All of this with the data to back it up.
I do not have any verification letters from Chrysler, I really don't think one exists
Jeff