Oh, Doctor! Home Run Call

I'm looking to get a specific Home Run call (Oh, Doctor! by the late, great Jerry Coleman) and I thought I could just grab it in the marketplace. But I'm not seeing it at all. Can you not purchase these? Or do I just have to wait and hope I get lucky with a pack?

Thanks in advance.

I quicksold one yesterday lol I thought there was 0 demand for it and I don't use them so I figured I'd clean it up by quickselling

Was a 1st Inning reward.

Available in the shop: https://mlb21.theshow.com/items/3b029d4810ab62194de14d4e511ba6fa