Some areas don't spawn every time. So you might have to make a new game a few times to get the right stuff. Makes it more challenging. The windows are pretty tricky to do.
Here's the old list. I can't remember if all these items are current or not. The hard part is getting them in the first place. There's nothing easy about the secret cow level in this MOD. Not for newbs.

Old Pieces:
1. A tome that opens a portal home.
2. The wooden leg of a boy who once swindled adventurers for a glimpse of a potentially good item.
Azmodan is related but you can't get the piece from him at the moment (now fixed).
Belial should have a piece, but it may be hard to get it from him with bishy bug. Drifter Cavern (Glacial Trail).
Reziarfg has one.
Dragons have one.
Most monsters in The Dungeon has one (not terribly common, but better than in 1.22)
Ditto for Act 2 Horadric Cube area.
The Dark Lord has one.
There's your seven.