The 260z rear beaver is a little different, so I guess it depends on your definition of suit. It could be made to work, but given the fact that the supplier still has not got back to me and the fact that the AUD vs USD is in constant decline I'm thinking I might wait to see if Wayne finally makes some.
http://www.viczcar.com/forum/forum/37-automotive-panel-craft/
Otherwise there is motorsport auto, or hand fabricating them. Which will take longer, but I don't think it should be too difficult to replicate these pieces. The only part I'm not sure about is weather you would first give the piece the curvature with a roller and then add the indentation (for 240z / Early S30z's only) and the sections for the bumper + exhaust cut out or if you would do those first and then attempt to roll it.
I think rolling first makes more sense than after.
Just takes a lot more time to fabricate stuff like this, than buying a pre-made panel to fit.