Just stumbled upon SDK supplies in Canada and they're having a sale this month on laminated bokkens, which are already at a great price and includes shipping. Buy one bokken and get the other free!
http://sdksupplies.netfirms.com/cat_bokuto_singles.html
Some of the woods include:
hickory
purpleheart
ipe
maple
oak
mahogany
Take a look at their gallery. You won't be disappointed.