Check out the sponsor TSA . They have several prepped shafts and maybe blanks available.
Willie - that is a nifty tool, where is it available?
A whole bunch of natural shoots will make real good arrows!  Depends on how original do you want to get.  I am not the guru by any means, just getting back into this skill set after about 50 years! The military does weird things to your brain 
 
!  Not being 21 anymore doesn't help either. Bounced a couple times too many!
Using shoot, you can work them down with a scraper and size them through a hardwood board, carefully.  See above disclaimer! 

. Like that little devil!  Drill a hole the size you want and gently force the shaft into it, back off, scrape, repeat as needed!  Takes a bit, but you get a lot of tinder for firestarting 

Hawkdancer