If you can’t buy it....MAKE IT!!

CFD244 said

Good call 67dart273, but it looks like the engine is still in the car so I'd be super worried about getting filings in the oil gallery. IMHO.

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Put a magnet next to the bit while your drilling. After its drilled/tapped you can prime the oil pump and let the oil pressure flush out the hole.
If you want I can make you up a fitting on my lathe. I would use a piece of hex stock. No charge.