The only similar authentic pieces that are even remotely available on the market from my brief searches would be a couple of demi-livres of Toulouse (meia livra de Tolosa) dated in the 1230s, which will set you back a few hundred euros. Most of the others (livres tournois, livres parisis, etc.) are locked away in museum cabinets and vaults and non-collectible but would bring multiples of that price if one were put up for sale.
The circulating coinage of the era (gold Angels, or more likely silver sous and deniers) is rather more available and can be had for a price, if you are just looking for Gallic and provincial French coinage of the 13th and 14th c.
You can get "museum copies" in gift shops and trinket shops in the museums in Paris and elsewhere that are replica tokens / cast copies, and possibly at the Monnaie de Paris. London's
Royal Mint takes it a step further and had or has got sponsored exhibits in museums that let you make your own (modern) medieval English hammered coins or screw-press coins with various dies, if you don't want to just buy a modern copy as a souvenir.
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