Sadly there are no aviation enthusiasts or organisations that
can keep and maintain the airworthiness of such historical aircraft
in Singapore. There used to be a collection of ex-RAF Meteor,
Vampire and other jets in Sentosa, which were subsequently sold (or
were they given?) off to a foreign buyer.
In more recent times, ex-RSAF Skyhawks and Hunters were either sold
for scrap or sold to foreign buyers. While a few of these are
preserved in the RSAF museum and polytechnics, I believe none are
preserved for airworthiness.