1889200 is a part number from a 1961-1964 Parts manual for a Dodge or Chrysler Manual transmission so i doubt you will get one off the shelf unless you get lucky.
You can get a manual from here.
https://mymopar.com/parts-manuals/
I did not even think they made a rear at that size but my 1970-1977 Bendix catalog shows a 140217(11x3) for a 1970-1973 Imp and LeBaron rear if you can find crossover for some other brand maybe it will help.
Should have been a 3250 for a rebuilt.
That was the old numbers but that could be a new number but somone switched them out by mistake as all BB Mopars use the same mounting holes.
Have these parts that i will be taking up to the http://www.moparsatjunction.com/ just to get them out of my way as don`t need em!
Complete Dash assy as seen with UNCUT wiring harness, Radio, clock and all plus a few misc ext trim pieces as seen have some extra door glass and regulators! Front...