most autosparkies do A/C as well. The bigger ones can modify hoses, or even make them from scratch. That would be your best bet. You need to use proper high pressure o-rings and proper A/C hose. pressures reach up to 1700kpa (thats 250psi).

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i