No, there aren't many more A330s available. All ex-Swissair and ex-Sabena planes could be placed, the two former Skyservice A333s will go to Malaysia. Currently not a single A330 is available in SE
And Volare's returned A330 are currently being placed, some will go to Qatar for example.
Etihad has contracted to lease a former SIA-A343 and it seems it was the last aircraft of that kind available.
I haven't heard of Etihad getting B777s, but where should they come from? There are four United B777-200ERs stored, plus one non-ER. Aeroflot might return their two leased ones, but nobody knows when.
Used modern widebody aircraft are rare in these days, so Etihad might go for new planes.
Me & You & a Plane Named Blue...