The only eating utensils Lewis and Clark issued to their expidition members was a one pint tin cup, with no handle, and an iorn spoon.
forks were not a common item at the commoners' table. Average people got by with a knife and spoon.
Wood, horn, pewter, iron, silver, or a clam shell will do. All of the suppliers have an appropriate form in one material or the other. You can hit the thrift store or antique shop for iron or silver types or search the local riverbank for a clamshell. there's nothing the matter with horn or pewter from one of the suppliers in our links section either.
You could even limber up the pocket knife and whittle your own. I find this a pleasant passtime between activities at events.