You'll spend as much as you would with BullyDog but you should contact the gang at UpRev
and see if the Osiris is available for the 3.5 AC. I can't imagine that they wouldn't have something since it's a VQ.
BullyDog is a "one size fits all" solution, UpRev is a custom developed tune. Osiris Pricing
(From the 350Z tab - there's no AC tab on the site yet)