I bought a $3 silver windshield sunscreen from Walmart and cut it to fit the front and back sunroof. Seems to help a lot. I'm in GA and probably not like AZ but it still gets pretty darn hot down here.
2014 Buick Enclave Leather w/tow package
2006 Chevy Silverado 2500HD Duramax (too many mods to list)
Georgia boy born and raised... well not so much a boy anymore