Datsun Roadster Forum-311s.org

I have a Kyosan Denki from my 67.5 that I am looking for a diaphragm to fit. I purchased a rebuild kit from one of our vendors but the diaphragm does not fit. The replacement diaphragm looks like what I need, but but when I went to install it in the pump I discovered that the mounting holes in the replacement diaphragm are on a roughly 1-7/8" while my pump bolt circle is 1-3/4". Anyone know where I can find a diaphragm that will fit?

Thanks.

Peace,
Pat