I actually bought the wood blanks myself and sent them to Clint. He turned them and got them back to me (I actually had the amazing luck of going from pen blanks to connectors in less than a week, though I imagine that's not common at all).
I picked out the ones I wanted from here: http://www.woodturningz.com/Wood_Pen_Blanks.aspx
Ended up sending 5 blanks to him, though I'm not sure how many he used. I told him to keep whatever he didn't use. Picking out the right wood was definitely half the fun. Made sure I got exactly what I wanted.