Some magical place that I'm not finding that sells things like Kingdom Hearts Piano Collections, Kingdom Hearts II Piano Solo Sheet Music, etc.
Honestly, I wouldn't mind blowing $40 on sheet music instead of downloading it online because I could support my favorite composers, thing is, I can never find where you can buy them, besides online, which isn't an option for me.

Simple answer: no.

Anime Sheet music is too niche of a type of music to sell in an open market. The only way is to ask a sheet music house to special order the music, which, due to licensing, resale, and sole sourcing, won't happen.

Square has a representative resale store (http://shop.squaresound.com/Sheet-Music-Books/) that you can get licensed sheet music from. Reading through their payment options, they allow money order payments, which allows you to buy the music through snail mail. I'd contact them about how to do this.