sorry buddy, i use aspen (shredded and chipped) that i still buy from a local pet store. i would like to move to cypress, but the pieces they sell them in are so large and chunky which i don't like (esp. for the BP's i have that like to burrow).
anyway another forum buys from and advises to look for a farm/feed supply store. there's a place in Kent on West Valley Highway that has mounds of mulch, gravel, etc. on their lot. it looks like a landscaping store, but i never stopped by to check the exact mulch they have and their prices. hmmm, now maybe i will.