I've been asked recently who are my sources... so here's a list.   The market is pretty volatile  and if you see a place with the wood you want, buy it, don't wait.  As an example, I found some cherry on a hardware store site and bought some, a week later.... all gone and they don't know if they can get any more.      There may be some dead links in here as even they change.  One not on here is Syren Ship Model only because probably everyone here knows of them.   All Right