Hi Ken:
Don't know if this will work for you or not, but I've managed to be able to find very good hardwood in various lengths and widths at the local lumber yard's scrap bin. While searching for some wood to build a strip canoe I came across a hardwood distributor that gets their wood in rough-cut form. They then have to shore it up and plane it before selling at their premium prices to customers. In the process, they end up with a large amount of scraps and plenty of sawdust that's free for the taking. In fact, the owner of the yard I go to told me I'm doing him a favor since he has to pay by the pound to have it removed as trash. Since the canoe only required strips that were 1/4 inch thick by 3/4 in wide, ripping them down on a tablesaw was relatively easy. In fact, I managed to sometimes rip 3 or 4 strips from the same scrap. The plans called for cedar but my canoe was built with white oak, hard maple, mahogany and walnut. All free and beautiful wood once I got through working it. I don't help myself to the sawdust they have because there's usually different varieties of wood mixed in. Instead, I save my own while working with each variety of wood and mix it with epoxy for filler. There's a big difference between the colors of maple and walnut and having the right color dust makes a big difference when patching. Whatever wood I don't end up using for constructing purposes can end up in the garden as a tomato stake or in the wood stove as kindling. Friends really think I've gone bonkers when they see me using pieces of walnut for kindling, but what the heck, it's free.
I'm now building a vacationer and manage to go scrounging around at the wood pile at least once a week. Whatever I find that's useable I take home and save. A few weeks ago the supplier received a large shipment of mahogany stacked on mahogany pallets. There were a few strips in the scrap pile from the mill, but I really felt like I hit the jackpot when they threw out the mahogany pallets. There were at least 8 rough-cut 1x4x16ft and six 4x4x3ft. Those will come in handy.
Anyway, the reason I'm telling you all this is you might be able to find such a supplier in your area who's interested in a similar win-win situation. Over the past few months I've saved various pieces of quality wood that can be ripped and cut "birds mouth" style to make a mast, boom, etc. Even though hard wood tends to be heavier, the birds mouth style is hollow and relatively light.
Happy hunting!