What brand makes good strut bars and where can I find them, my ride is a 2006 G35 Coupe. looking for front and rear bars

 

VRT makes a front brace. You can see the thread here:
https://g35driver.com/forums/brakes-suspension/85320-g35-front-strut-tower-brace.html
Or, pm wa2good.

And stillen makes a rear strut brace for the coupe.

And if you want chassis bars, look into GTSpec bars. This thread is about the lateral bars on a sedan:
https://g35driver.com/forums/brakes-suspension/93994-gt-spec-lower-tie-braces-sedan-review-pics.html