Re: where can you find community lots from original.

First of all you should be able to download schools and hospitals from the Exchange.

But it is perhaps easier to place it yourself in the Edit Town mode. Bulldoze the building that is not working for you and then access the Build/Buy mode on that Community lot:

You should then see a new symbol in Build mode: "Community Objects" - There you can find all the "rabbit holes" that you can have in your game like the city hall or school or hospital or bookstore etc. Just place the building you are missing (e.g. the school), decorate the lot as you like it and you should have a functioning community lot in your game.