Shortages?

[Mr. 16 gauge]

The gun boards are flooded with posts re: shortages of ammo/reloading components. Is anyone finding this to be true with black powder supplies, esp. traditional supplies? I haven't had to buy anything in a while, and have a fair stock of powder, flint, lead, and caps, but was planning on doing a fair amount of BP shooting over the summer (still trying to hit stuff with the trade musket.....the only thing I've been able to hit so far is the ground, and that's if I drop the gun!), and was wondering if there are still adequate supplies of these items, esp. percussion caps.
I've also heard that some folks make their own caps....has anyone ever tried this?