Flathead Cam Spacer

[Paul Phillips]

I am reviewing the parts manual in preparation for engine assembly, I find the the previous mechanic had left out the camshaft spacer, item AC on the diagram, p/n 142 9090. 

I am presuming this goes between the thrust plate/retainer and the sprocket, but would appreciate confirmation.

Would also appreciate dimensions on this to see if I can locally source an equivalent.  Conversely, if someone has an extra one they can drop in an envelope, I would be happy to provide a thank you payment.

Thanks
Paul