From Poot’s House of Cactus, this is in my opinion a Trichocereus macrogonus type plant similar to Trichocereus macrogonus RS0004 and Luther Burbank.

This is not their blue matucana type Trichocereus peruvianus they have growing near their sign.

Cuttings of Poot’s peruvianus #1 aka JS20 are regularly available from Cactus Affinity.