[Jay in Mass]

I want to install an oil pump in my 59 series flathead engine and need a new oil pump screen. The only screen that I can find is flat on its edge. My oil pump is not flat inside the screen cover. It has a flange with two bolts inside. The vendors sell the same screen that I have and also sell screen covers with the flat spot inside just like mine.
Does anyone now who sells the correct oil pump screen? Thank you for any and all answers.
Jay