Pen blanks are so cheap, they almost pay you to take them.
Many high end custom cabinet shops use exotic wood. All you have to do is find a few in the phone book and pay them a visit. They actually throw out
tons of scrap.
Whatever it happens to be, it will be ok to use for pens and the best part is, it will be free.
Cause ya know, if any cue makers send you scrap, you can't expect them to
pay the shipping as well. Your shipping cost will be more than what pen blanks are worth in the first place.
Much cheaper to go scavenging at the cabinet shops.