Found a dual port wastegate actuator when I went out to take pics of the MBCs. I believe it is a 6 PSI Can but since it is dual port you can pretty much make it whatever boost you want (with the help of a MBC). I was running 15 pounds on it when I was using it.

http://www.lightweightmiata.com/forsale/P6224659.JPG

I'd take $40 for it.