Sourcing balsa for large runs of kits has been an issue in the past. I’m guessing that getting a supplier for the latest kits is no different. If you really want a balsa cone for a classic, there is always eRockets. I’m lucky since I have a lathe and can make pretty much whatever I might desire. It usually boils down to the plastic cone not being exactly what I want, such as the Der Red Max nose cone (60AH) being supplied with the Super Alpha kit a few years ago.

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Lee Reep
NAR 55948

Projects: Semroc Saturn 1B, Ken Foss Designs Mini Satellite Interceptor
In the Paint Shop: Nothing! Too cold!
Launch-Ready: Farside-X, Maxi Honest John, Super Scamp