these were built by pullman for the Southern Pacific's famous Coast Daylight in 1937 for use between San Francisco & Los Angeles CA as Articulated 44 seat chair cars. 7 pairs of these cars were eventually retired and sold to Algoma Central in 1974 and used for passenger trains across the system. I have the disposition of 4 pairs of them. the following 3 are the ones I am looking for

#2496-#2497 (last I heard sold by AC to Nicolet Badger Northern Railway(NBNR) to ???)
#2453-#2454 (AC #454-#455, to MOW bunk car #10634-#10635 to ???)
#2471-#2472 (AC #460-#461 to MOW Bunk car #10672-#10673 to ???)


any help would be appreciated!

sources:
http://www.trainweb.org/algoma/proster.html
https://vanderheide.ca/blog/2017/04/26/work-car-wednesday-9/
https://www.flickr.com/photos/53192745@N05/5086581243