1/8th oz yeast is around a teaspoon..
flour is usually sold in pound bags, so just use 2/5 of a 5 pound bag and you're fine. if you have a kilo bag (caputo cheese market sells 1kilo pizza flour bags), just use most of a bag.
these are all approximate since the amount of air in the flour, the size of the yeast, etc, will all change the conversion. weight is always the safest way to do these things, so you may want to invest in an electronic scale.
-ed