My go tos are FSUSA RY4 (too!), TV mint choco chip, VS Frisco, & Ms. T's gingerbread. Seriously, Ms. T's gingerbread cookies is the best gingerbread flavor that I've tried.
I really think he probably went from Capella's flavoring to Perfumer's Apprentice flavoring. I know I got a sample of PA gingerbread when it was in the test phase. I told Linda I didn't like it, but apparently a lot of other people liked it, so she proceeded with it. I am going to order some more Ms. T's GB cookies soon, so I can send you a sample to see if you like it when I get it. I just wish it wasn't so expensive. I've tried to replicate it, but I haven't been able to, or else I would just make it myself!