Roundtrip in J when booked with NH is 95K, and NH is a transferrable partner from both MR and SPG. Try seeing if you can find star availability or NH flight from one of its west coast gateways(SJC/SFO/SEA/LAX/YVR) and then manually adding a domestic leg if thats available.
Note the NH award search tool tends to be more accurate than that of UA, and often shows availability on OZ that UA does not show IME.