Help Needed; IFR Orientation Aids for instruction

[helmet fire]

Hi all,

I was wondering if anyone knew of, or has, a computer generated VOR and ADF system that can be used to demonstrate orientation exercises to IFR newbies?

I have tried google until my eyes have bled, and I cannot seem to generate any hits on the prune search either.

Does anyone have any hints short of buying Flight Simulator?

Thanks,
hf