The Lynx have been grounded for over a decade & 111 Sqn was disbanded only to be resurrected following the induction of the Z9. As some has already pointed out, they are unlikely to be sold. Only AugustaWestland would be the likely buyer if that we're ever to happen. Preserving them from the...
Using F-27 as donor aircraft for re-equipping the ATR's is a feasible option for PN. Examples of similar donor programs involved removal of the Harpoon & CIWS weapons platforms from retired Gearing class DDG's & retrofitting them to the Type-21 FFG's.
The MPA suite on the PN F-27 is nowhere...
That figure of 3 x-craft is unlikely to change in the near to medium term. Control of these x-craft was taken from SSGN & placed under COMSUBS. Whilst a not so clear decision, it was a long time coming & had always met heavy resistance from SSGN.