I got boards of straight grained olive wood 90 cm long through a wood company in Russia that sells it for instrument making...along with plum, apple, pear and some cool European walnut. Just spliced them and bravo, a full length bow. Shipping just about killed me, but the price of the wood was very fair and they worked with sizing for me. Worth a thought if you can't find any staves. Their plum was really nice quality as well. I'd post a link, but against the rules.
