I remember seeing these somewhere.  Out of stock though.

https://zcardepot.com/engine/engine-rebuild/crankcase-pcv-vent-hose-oem.html

maybe this one.

https://zcardepot.com/fuel/fuel-injection/pcv-crankcase-vent-hose-to-intake-280z-280zx.html?gclid=Cj0KEQjwuZvIBRD-8Z6B2M2Sy68BEiQAtjYS3NWQQxvtakAeTiwlnJnM2FDZUd4NzQObqwyAoZQNxcMaAmJK8P8HAQ

Edited May 1, 20177 yr by gwri8

Looks like they're not keeping their web page updated.  Their eBay ad says they have three.

https://www.ebay.com/p/?iid=222466640593&lpid=82&&&ul_noapp=true&chn=ps

I ended up finding another old post on zcar that stated using a heater hose from some other car, cant remember the part number put you cut off about half of it and it works great! It even has one side that is a little bigger. Runs great now, thank you all! 

That hose is a Gates part #19726.  It's made of rubber so make sure you are using heat shields