This is a pic of the microbore hose supplied with a 5000 psi hand pump I purchased. This us the 1st attempt. 3 more hoses under warranty and finally have a good one. Being a retired hydraulic engr I can tell you whomever prepared the hose and clamped the ferrule did so improperly. At this point it's junk. You can buy the fittings, but, the dies and crimp machine would be cost prohibitive. These gage hoses are toss away and never fixed. Stauff corp. sold assemblies you may want to contact them to discuss your options.
Yeah, I'm absolutely sick of these run of the mill D2/D4 "PCP" / "paintball" hoses. Did a deep dive the other night and found a solid list of manufacturers and suppliers of hoses / parts / couplings / fittings and complete hose assemblies. There are much better options out there for industrial-grade hoses with endless connector / ferrule options that will mate up with Foster QD.
I'll buy 50pcs of complete assemblies if I had to fulfill a min order to get 4-5 hoses for myself. They're not all that expensive, and I'm sure the remainder would sell themselves.