Bread-Bakers v100.n033.5

The recipe for Caraway Rye a couple weeks ago was great.
I too used regular butter milk and did not age the sponge.
What I would like to know is where do you get ground caraway seeds?
I used an old pepper mill to grind them up but it was a long and
tiring process. I suppose a coffee grinder would work well but I don't have
one.