Collecting everything?

[Sideshowcorey_PSN]

So I am trying to collect every player in the game. My son points out it’s not possible as Alomar is no longer available. How do I go about getting players like the 1949 Breakout 83 Edwin “Duke” Snider, or the 1993 Rookie 79 Pedro Martinez. I see I can put in buy requests, not sure if they will ever go through. Then there are players like 79 Rickey Henderson that has no locations and also not in market. Has the window basically closed for getting these guys, or are they located somewhere I am not seeing? Thanks for any help.

[the_dragon1912_PSN]

Rickey- Mystery conquest map, A duke order will go though. He is still available via 10 ranked wins in the pennant race rewind pack. Pedro you will have to wait for the 11th inning and see if they drop henchman rewind packs with the boss rewind packs