I would love to see an airworthy Viscount,
Especially as out of all the classic airliners produced in the UK there are almost none preserved in airworthy condition today (the biggest is the jersey heron I believe)

A Viscount certainly seems a feasable project, spare dart engines should really not be a problem as The Fokker F-27, Fairchild FH-227 and NAMC YS-11 also used this engine
And though 3D-PFI may be the only flyer, there are probably some more airframes around in africa (The ex british world examples in south africa?) which could be used for spares.
But as always, it’s probably the money which will prevent it from happening 🙁