Player card trays that fit player cards that have print protectors covering them (link below). Note that each tray has holes on each side with different depths depending on if you trimmed the protectors to size of the player cards or left them untrimmed. For untrimmed it's expected that the player card is centered within the protector.

I printed on a X1C with standard quality .4 nozzel using Bambu's black basic PLA on a Bambu textured plate. You should print them VERTICALLY along the long edge with no supports (otherwise if you do it flat it trys to put supports in the slots). I didn't need a brim in my experience.

Protector Sheets : 
Henoyso 5 Pcs 8.5" x 14" Rigid Print Protectors Clear Heavy Duty
https://www.amazon.com/Henoyso-Protectors-Protector-Photographs-Certificate/dp/B0CHF95DL8?th=1