I've been sitting on some 91 Z32 brakes and I just heard from a guy who used to sell goodridge and later technafit brake lines for doing the swap. He informed me that he couldn't sell me lines and that what I need is actually the same line used on 240SXs to convert to these brakes. So far the only brands I've seen that carry these lines are circuit sports and agency power. I'm not too sure I trust either brand so if anyone would like to chime in on what some good 300ZX brake conversion lines are?
If Greg doesnt have anything for you Don at PDM has made them gor years. I run them. I think they are about $70ISH and well made.
His email is firstname.lastname@example.org