Music not composed by Addison

So I'd like to supplement my POTO soundtrack by adding the parts from Faust, Norma and La Traviata. I'm sure I can find recordings of this music on CDs somewhere, but are there any done by the Hungarian State Opera Orchestra, who did the rest of the music?
And, should I find recordings like that, which tracks are the ones that were used in the miniseries?

Thanks!

-J