This site has a few spice blends that include ground bay leaves.
Many Garam Masala blends include ground bay leaves.
Several online vendors sell ground bay leaves. Years ago, when I was still prepping wild game for the hunters stationed at Edwards, one of the guys who entered barbecue contests used a lot of ground bay leaves in his "secret" rub. He would come and prune my bushes for me and haul away a huge bundle of stems and leaves. I sure missed him when he was transferred to another post. His wife was not a cook, didn't want to learn but liked gardening. I got her started growing herbs and gave them a couple of scions from my bays.