Hydraulic hose is spec'ed by ID size.
Synflex hose (The hose Crown uses) has a smaller OD than a lot of other standard hoses most hydraulic shops stock. Most shops in my area use Aeroquip hose and aeroqip will not run through Crown hose sheaves, with it being too large of an OD.

You can buy synflex hose in bulk, all your fittings and swaging press kit... But at that point you have to figure is it cost effective!?!?!