The McCormick Pepper Grinder is really cheap. It's like 15 bucks and, assuming you don't eat black pepper on absolutely everything you consume, it should last a while.
When, after a few years mine did run out, I panicked. The store where I bought mine (Big K) went out of business. I looked all over town and couldn't find one anywhere. So, being single-minded individual I am, I called my mother.
She told me her next door neighbor had gone through a similar ordeal and hadn't had any crushed black pepper for weeks and was notably irritable at the fact. Her son, noting this irritability, got on the internet and actually found a way to refill the McCormick Pepper Grinder!
If you type those words into google you're sure to find it. I know that sounds like a lot for black pepper... but when you want, you want it, right?