You can depart on any date in December?
You may want also to consider transferring SPG points to Alaska. You would get 125k AS miles.
There are days when they show at least 2 seats in Y on Fiji Airlines for the outbound at 40k miles per person. Those should also be available with AA miles.
They also show many days with DL in Y for 50k miles. Beware however that DL and AS are parting, so you will have to act quickly, and if you need to make changes later it may be difficult.

Looking at the AS availability, you should not have trouble finding two outbounds in Y for your SPG points. But your inbound is probably the much more difficult thing to find.