Foster connectors aren't rated to 3000 PSI unless they're stainless steel on both the male and female sides. I got stainless steel connections from North Shore Compressor & Equipment. As far as the extension hose, I believe the FX hose has the 1/8 BSPP fittings? Or is it BSP? Your best bet for that hose, and cheapest, is if you can find a place in your town that makes hydraulic hoses. I paid $18.05 locally, including tax, for the hose for my fill setup, and it would have cost me close to $40 to order it online.