It's a very simple piece to fabricate if necessary. All it does is prevent splashed oil from the crankshaft from going straight into the road draft tube, so anything that will shield the hole from thrown oil and still allow vapors to exit will be sufficient.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!