Billy Q,
Try this site for your hickory smoked salt.
http://www.chipotletx.com/cart/shop/category.asp?catid=156
I have never tried smoking any kind of salt but I don't see any reason why a person couldn't do it with no problem. I smoke a ton of jalapenos and wouldn't trade my chipotles for any store bought brand. I have tried the hickory smoked salt from this company and it is good. Hope this helps.