I've dealt w/ Galen a few times over the past 20 years or so and always considered him a straight up guy...although not inexpensive, always worth the dough spent!.
I wasn't initially enthused w/ his 'GTS' repop tag business but considering the way things have gone in the Chevy world can more appreciate how since we can't stop these from appearing anyway, it may be better that the source for these is also documenting them as such in his database...that information is then held hostage unless you buck up though?.
GTS Link -
http://www.gvgovier.com/
While on the subject, Marti offers a similar repop tag service for Fords too..
Marti Link -
http://www.martiauto.com/
~ Pete