I made an interesting discovery recently while trying to replace the PS lines on my 2005 G35x sedan. Yes, it sucks having the one-off model of G35 where all the spare parts are sliiightly different than the RWD models, but this may help my fellow AWD model owners in the future. I noticed that the combination of 2 of Z1's silicone PS hoses will actually work perfectly for the 04 - 06 G35x power steering reservoir (see attached image). I have reached out to Z1 to ask if they will let me make a special order for these 2 hoses only. I will update with their response. Cheers!
Well, mostly good news! Z1 was able to sell me the PS Return Hose separately, but they are unable to split up the DE hose kit. I went ahead and bought the full DE kit and the single PS Return hose from them. I will update once I get them installed on my G. Cheers!
