I've figured out a solution. It's not "pretty" but its functioning and that's all that matters until we complete the transition to new Google Sites. What I've done is paste the PayPal button's code into my webpage's HTML code (at the place in the code where the "busted" PayPal Button current exists) using Google Sites's HTML Editor. Once in edit mode, the HTML editor is located on the right side of the webpage's toolbar. Warning: Its tedious.
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