Here code states 2 NG/Propane hoses can not be coupled. As well hoses longer than 10' aren't allowed. You might find someone willing to crimp you a longer hose.

There's 25' hoses available on the many sites, I was just hoping to extend my existing one rather than replacing it entirely. I'm sure a coupling is out there, I just don't know what to look for because the connections aren't named in a way that I recognize.