RS712 is unserviceable, suffering from severe delamination by all accounts. The American climate hasn't been kind to her. She's been inside the EAA Museum building at Oshkosh since at least October 1993 when I photographed her there.
TV959 (the TFC - but thought now to be EX TFC - machine) is potentially restorable to fly, with a two year timescale mentioned. Although that would require a) a vast sum of money, and b) her alleged new owner to be willing to return her to flight.
Glyn Powell is currently manufacturing Mosquito fuselages in New Zealand, but his first one has taken an age and is 'only' a static. Airworthy ones would presumably take a lot of time and money (bit of a recurring theme here...)
So never say never (just be ready with an open chequebook
)