mikuni accelerator pump cover help!!!

I have a 79 kz1000 i'm restoring and it looks like a cover for the accelerator pump is missing. Its a triangular cover with three bolts, and three pins on the recessed area.

I was wondering if anyone had a diagram of the accelerator pump for a 34mm smoothbore. I need to know if it has a diaphragm or if its just a gasket. I'd like to just make one out of aluminum and use gasket material and make my own.

feedback pls!!!

regards

Mike

Here is a pic of a kit for my 650, yours should be the same. As you can see the 3 hole piece has a diaphram with spring so you will need this cover for it to work properly. I'm sure someone here may have one or know where to get one. Good luck..