There is no replacement. Strap a credit card to the back of your phone or pay cash.
Use a solvent to dissolve the plastic from the card then epoxy the extracted antenna and chip innards to the back of your phone case. Problem solved. (I'm only 50% joking, you can actually do this but maybe epoxy isn't the best option.)
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Use a solvent to dissolve the plastic from the card then epoxy the extracted antenna and chip innards to the back of your phone case. Problem solved. (I'm only 50% joking, you can actually do this but maybe epoxy isn't the best option.)