I don't think the panic has hit the black powder market.
I think that has just become a rather more common hobby over the years.
Sunday I thought I had another tin of 100 #10 caps also. I started to look around and realized I was on my last tin.
So I may only have half a tin left.
Here there usually are places that have them in stock. I'll have to call around to see.
A few weeks ago I found lead balls down in Orange county. But had to order wads online.