Recommendation for Mazda3 (2016) Connect Software Update & CarPlay Retrofit - Bay Area / Houston

Any recommendations for a shop that can do both the Mazda Connect software update and Apple CarPlay retrofit installation for a 2016 Mazda3?

My current OS version is 55.00.750 NA N, so I understand I need the firmware updated first before installing the CarPlay Retrofit hub/box. Can in the Bay Area or Houston.

Also helpful if you can share approximate pricing and whether you used a car audio shop, or independent Mazda specialist? The official dealer asks for over $500.

Thanks!