If you can find out what the thread is {looks like a CGA euro thread} a hydraulics hose company may be able to put together something for you. You can also check with Van Jacobi at Airhog (http://www.airhog.com/hp_fittings.htm).
{note that Van is who you'll needto speak with}
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I've made alot of visits to hydraulic hose companies over the last couple of years as well . . .