It depends upon whether you want to go with a vintage (Type 1) photo, or a glossy color photo that's not necessarily vintage.
The original vintage photo would likely be black & white, and will cost a lot more money to obtain. Plus, you will be at the whim of what is available at the time (since they're not mass-produced). But you will have a rare and desirable vintage item to match your vintage pennant.
If you opt for a color contemporary photo, you will have much more to choose from. Basically any pose you can imagine... Batting, Catching, Portrait, Posed, Action Shot, etc. If you go this route, you can simply search eBay for "Thurman Munson Photo" and find dozens of choices. Expect to pay $5 - $7 dollars plus roughly $5 shipping.
Hope this is helpful.
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