Ideas for Keystone water connection upgrade?

Hello all. I have the exact same hookup. It has been dripping for a while now. This weekend, it started gushing out from behind the part you tighten up to the water hose. Took it out and found a thin round o-ring type washer behind the lip where the water hose washer fits. It was broken up in a bunch of pieces. I tried to find an o-ring at Home Depot. I found one that looks like it fits but it won't stop the leaking and spraying. I'm off to visit a Keystone dealer today to see if I can get a replacement part. I would suggest you do the same before yours does the same thing mine did.