Looking for an AD&D game
I think it depends what you like about AD&D. I have played all versions, and will happily play all versions but for fourth.
3.5 and PF can be a lot more 'munchkiny' for some; and, with the exception of the removal of THACO, they're probably more complicated. Now if you don't mind that, I do have a game with only 5 characters at the moment, which I could fit a sixth player into. The players in it are all seasoned players; and they would all be willing to help out a new player, as would I.
My only older edition game doesn't really have room in it for an extra player unfortunately.