Wolf hair brushes do not exist. The legend comes from an unthinking translation of the real name: "langhao", which calls a wild weasel from Siberia. Its tail hair are yellow, terse and sharp but never very long so there are no large brushes in this material, and they don't keep large amounts of ink. Anyway that's the best tool for awkward beginners in calligraphy and there is nothing better for traditional drawaing and painting
Da lang tou : Important and rare pure langhao brush (weasel have rather short hair and make it impossible to ask for bigger than this). Handle of bamboo and horn, in a box, made in Anhui
If I had a spare 145 Euros, I would already have ordered one. An important brush in a box, made in Anhui. It sounds like a Le Guin artefact.
LANGHAO! Come, oh wild weasel from Siberia, with your sharp and terse tail hair!