Talair did operate P2-GKZ, inherited from Panga in the mid-70's takeover. It was eventually ditched in Vanuatu.
CAA operated P2-CAR, a Turbo Aztec. Mapmakers also had a Turbo Aztec P2-COC.
The SDA church operated P2-SDM, an F model. It was sold to Peter McNab of Pacific Rim Resources.
The hulk of P2-TGP (I think it was) was in Rabaul when I was there.
Elomair also had an Aztec for a while, which I think was P2-SRP.