Matty - after your PM today I remembered that I got an hydraulic fitting and hose from Bunnings for the simple hydro system evacuation set-up I mentioned in this thread.
http://www.ausmini.com/forums/viewtopic.php?f=2&t=96810Bunnings have quite a range of inexpensive hydraulic fittings and hose in the Tools section that you could check. I don't know the exact size and thread type of the fittings in the How To you referenced.
https://www.bunnings.com.au/search/prod ... ctFrom=AnyEnzed and Pirtek outlets would definitely have the fittings if you know what to ask for.
Here's a picture of the barbed hose end fitting I purchased and screwed into a tyre inflater valve. Note the package says maximum working pressure is 150 psi, which should be adequate for your purposes.
https://www.bunnings.com.au/powerfit-1- ... e_p6210511Attachment:
Hydro Hose End Fitting 1.jpg
Attachment:
Hydro Hose End Fitting 2.jpg