is there a full bushing kit for g35/350z's?

Check these guys out.

http://www.energysuspension.com/index.html

http://www.mynismo.com/products/?id=5348&rsku=21450

It's not poly, but a upgrade to the stock stuff.

+1 if they have the kit for a G get theirs. Had energy suspension poly motor mounts on my 02 RSX-S and they were great.

That is the only upgrade that exist's for the Z or G short of 350EVO's very expensive sperical bearing bushing set.

Energy is on record for saying that the oem bushings in their opinion are very good and they have no intention of making anything for the platform, Z or G.

call stillen they sell them for pretty cheap... also look into adjustable sway links they help out a lot too... not sure where to get those tho