I make my own.
Two parts Bees Wax to one part pine pitch.
Heat up the pitch in an old can until it boils a little, use a dinner fork to lift debris out.
Then stir in the Bees Wax and take it off the heat.
Pour it in a container of some kind and your good to go.
I roll it into a ball about the size of a golf ball.
And with it in a plastic bag, it will last forever.