CF Moto V3 crankcase

[853am]

Hello,
New guy here. I'm rebuilding a 2004 V3 and the left side crankcase is missing a piece of the fin/baffle that is located under the crankshaft. Anyone have any experience or advice on how to proceed?
Option 1: put it back together and don't worry
Option 2: wait until a used one becomes available on the market
Option 3: have a new fin welded or bolted in
Option 4: modify a CN250 crankcase w/the existing V3 crankcase

This is my last hurdle, any thoughts would be appreciated.

Thanks!
Rich