A quick Google provided this:
...the then Lough Erne Aviation museum trust run by various local aircraft enthusiasts and ex 209 sqn personnell such as Brian Pendry and others.
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source)
You may have found this already of course.... Have you tried asking at the Castle Archdale Countryside Centre & War Museum? I get the impression (but I may be wrong) that local aviation museum plans may have ended up merged into this museum.