Fill hose?

So I got my new Hatsan Spark set up and running. It took a bit. My fourty pound 115 volt to 12volt transformer was not strong enough to run it so thought it was broke. So I hooked it to my pickup and it ran great. It took like a minute or so after closeing the vent to fill to 200Bar

I may need another fill hose cause the one I got with it leaks. I took the one off my hand pump to fill my rifle. I tried to tighten everything but still a leak. The one from my hand pump does not have a filter.

I contacted Hatsan but they want more info. I will send it tomorrow . They said about O ring for the quick connectors. Strange to me.

Question where does one order a fil hose at a fair pricel