#1
The screw the locks in my locking tunners or whatever thier called on a floyd rose is split and i cant get it off with a allen wretch is thier any other way
#2
What do you mean by split? Is it in pieces? Or is the bolt just stripped? If it is stripped, try grabbing it with some pliers or a small adjustable wrench (if you have one). They also make tools specifically made for turning stripped screws/bolts. If it is in pieces, then I don't know what you would do.
#3
What are the tools made for turning stripped screws and bolts like what is it called?
#7
Since it's a screw at the lock nut, just grab it with a pair of pliers (vice grips if you don't have the hand strength) and then turn it.

Most hardware stores will have replacements....generally not in black however.