These whacky shape pieces always drive me crazy. I usually end up finding the weirdest shaped part of it and try to match that because it's usually easier to see.
Check out these other sites for the remaining pieces...West Karana
A Mythspent Youth
Diary of a Wizard
Legends of the Spiral
p.s. We did have a winner for the April fools day prize. Swordroll (email addr, not wiz name) was our first entry winner. Turns out it wasn't an April fools joke afterall or at least not on the people that tried for it!