I think i have this exact same fish but i don't know the ID of it either i looks VERY similiar. I bought a couple of fish that were meant to be Rusty's. The other one i have defiantly is a Rusty but i am unsure about the one that looks like yours.
I am very intrested to see if anyone can id this for you and it may solve a puzzle for me at the same time lol.
Sorry i couldn't help.