Where to find speedometer drive gear for 1972 NP205?

[67 K10]

Title.

Putting together a 1967 K10 and I've upgraded to a 1972 drive train. However, the transfer case that I purchased is missing the speedometer drive gear in the rear output shaft. It's the last year for the steel gear that has a smooth-bore and is used as a spacer between the rear output yoke and the bearing in the transfer case.

Not necessarily looking to buy one here, but would anybody happen to know where to find one? Searched multiple other forums and selling sites but was unable to find one, and they're no longer in production.

Thanks in advance! Looking forward to hearing your responses.