Hi Nick,
Finding any period outside braided hose is getting harder, if not impossible. So what I have had to do with some hoses for the CSP311 restoration project, is look at other model hoses and see what dia./ bend/straight length I can use, e.g I have just brought a 510 wagon fuel vent hose as its got the correct radius bend for a coolant pipe. As for the vacuum hose, as its not containg fuel/oil, and if its just faded but not particularly worn, I use a good quality marker pen (Pentel N50) to colour in the fade. I even colour in my red fleck of the non Nissan braided fuel hose I use.
Good luck