Anyone have a loose 8N crankshaft gear?

I was putting my engine together today after getting the block back from the machine shop, and discovered the crankshaft gear he sent back was not the correct one. They removed the gear for grinding the crankshaft, and must have gotten it mixed up with another crankshaft they were doing at the same time and swapped the gears(?) Anyway, after searching the shop, he told me he does not have it, but ordered me another crankshaft and camshaft gear to make sure the timing marks line up. I do not know where he is getting this gear, and want to make sure it is the correct one for my 1948 8N. Does anyone have one kicking around that they can send me a few pics and take diameter and thickness measurements for me? It would be a bummer if I put it all back together and it wasn't set right.

Here is a pic of my status - the crank is in place, along with the pistons. The rear upper rope seal is installed along with the retainer and the entire assembly is spinning ok - tight, but can be turned by hand on the crankshaft.

TIA,
Dan

TOH