Okay, let's take a step back.
You have fitted camber adjusting arms to the rear so that should take care of the camber, and you can also fit lock out plates to these.
If you are running the stock rear spring carriers then you can not fit standard adjustable toe arms.
If you want adjustable toe arms on the rear, you will require something like the image below, (these are what I run) and also use lock out plates, however these are expensive and overkill for your application.
Perhaps in hindsight you should have bought a pair of camber arms and a set of toe bolts as a kit.
However the toe bolts are available on there own, but please note that the bolt hole in the subframe will require elongated using a template which should be supplied with the bolts, you can not use lock out plates with these bolts.
https://www.tarmacsportz.co.uk/spc-performance-nissan-350z-02-08-rear-camber-toe-bolts-pair.html