Aniversary Is cool to have but other than having Italy I just wasn’t all that stoaked about it. The sculpts in mine were really bad in alot of ways I ranted about this along with others when it came out . 1942 Second Ed is awesome and with a bit of tweaking you can probably get a better experience than AA50. HBG and FMG have a set of Italian minis and roundels you could easily use. As far as balancing goes you could simply combine Germany and Italy and simply use your Italian pieces in place of Germans where it calls for them or use some house rules.
You can get the Aniversary rules too but I’m not sure where.
While I might dodge some stones being thrown here AA50, was not a favorite of mine. For what it costs to get a copy it’s not worth it. There are a ton of threads on here as to how to make your own version of AA50.
Personally the attraction of this game for me was to have the game in my AA collection. I have all the board based AA games except for Guadal Canal and AAE40.