Depending on where in AZ you are… Summit 4x4 in Prescott is a great shop and very knowledgeable. I don’t know about the Roxor but they specialize in Jeep and Toyota offroad builds. I owned a offroad tour business for years and they took care of a lot of our builds and maintenance, probably the only shop in northern Arizona that I would trust for 4x4 work
Depends on what your needs are? Your profile says Queen Creek. There are a lot of diesel shops in the east valley. Elite Performance, Diesels & More and both up in AJ, and there are lots of mobile mechanics that can come to you.