If you do come accross any tours through Windsor please post up some detail,
I too am from penrith so very interested in what comes of this
The old mafia house was purchased a few years back and has now been renovated so I'd suggest not trying to go for a visit there
There is the old Beecroft Slaughterhouse which is in Ropes crossing, well worth a look but be careful of holes in the grounds from rabbits, prickley bushes and possible asbestos in the buildings