450cc fill bottle

I bought a 450cc 4500 psi bottle from AliExpress for my Condor and ended up selling the gun before I could mount the tank. It is M18x1.5 threads and I’d like to make it into a mini fill station for my Evanix Rex-p pistol. Does anyone know where I can get a low profile valve and fill whip? Not sure how to set it up. I need a small fill station to add to my kit.
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Thanks!