not long left.
I d say you need some more, as you know what newborns are like, as soon as you put a fresh nappy on they poo!
Perhaps bulk out your stash with prefolds or terries just till you see what suits baby and you etc and they grow out of them so quickly too.
Wraps wise my only advice would be go for one that fits well over the sandys. I had a few sandys and used thirsties duo size 1 ( which i loved on everything else and is my fav wrap) and the little leg bits of the sandys would stick out and wick
I think mother ease airflow fit well over Sandys but maybe someone will be along to confirm