440 flex plate for cast crank

Running a cast crank in my 440 with an unbalanced stall converter. If I am not mistaken, I need a specific flexplate for this.

B&M# 10237

Anyone have a used one laying around? Or new I guess?

I would like to spend around $40-$50 for one plus shipping

I know they are $100 online but I figured I would give you guys the chance to clean up some.

Thanks,

Dakota