In The Eco Gentleman's Shaving Kit: Back to Basics by Rob Knox at Greenopia, there is a reference to a shave brush made of cruelty-free badger hair, linked to a listing at drugstore.com for a shaving kit from Baxter of California, which listing describes the kit as Environmentally Friendly and Cruelty Free.

However, a Google search for cruelty free at baxterofcalifornia.com produces no hits, and Baxter's own description of their travel brush (in that kit), and that of their other shave brush simply don't report how the badger bristles are harvested. It is hardly plausible that Baxter of California would fail to mention that the badger were spared death or injury, as this would repel few-if-any customers, while attracting many of those who would otherwise purchase high-end synthetic brushes.

(Mr Knox also declares old [straight] razors from junk and antique shops are perfectly suitable once cleaned and sharpened, but this is only true in cases where the straight razors were of high quality before they got dirty and dull. There are plenty of new straight razors, such as those from Zeepk, which aren't suitable, because they are badly manufactured.)