I have the sunshield from the Z store at the link below and it works great! But I also make it a habit now to tint the windshield of all my cars. So I've got like a 70% Suntek film on the Z windshield right now. When I forget to put up the sunshield sometimes, at least the tint is there to help keep the car cooler and protect the dash some.
Motorsport! UV Sunshield, 09-14 370Z - The Z Store! Nissan-Datsun 240Z 260Z 280Z 280ZX 300ZX ( Z31 Z32 ) 350Z 370Z Parts