anyone runnin the greddy kit?

I have the z6 in my coupe. I am running the greddy 15g kit. The only thing is, I don't have a wastegate actuator. I can't seem to find one either. Does anyone have any suggestions? I would like to get an actuator from another turbo but I have some conerns.. ie does the actuator open the wastegate all the way or just part/most of the way? And I would need to get an actuator set at a rather low psi. around the 5.5psi area.

thanks for any info
-rollmodel