Hi, I am been searching for the same for quite awhile. I have not been able to find anything in a freeplay FMGC trainer. There is an addon program for Microsoft Flight Sim 2002. It's call Airbus Pro and made by PSS Software. Here's their website:
http://www.phoenix-simulation.co.uk/
I have used the program and it does an ok job with "armed ILS approaches" but I haven't tried any non precision approaches with it yet. It has a few quirks (software bugs but overall it does an ok job)
Let me know what you think.