All wood cutters have plain wood. I buy it for pattern stocks, so if you locate the actual cutter, rather than the retailer, its easy, cheap and if they practice good blank layout, is stronger, straighter and stabler than any of the fancy stuff. The last 2-piece and sporter length pattern wood I bought at $25 each, a couple years ago.
When I left Oregon I took about 20 English walnut pattern blanks at $15 each.
That's why I mentioned Roger Vardy, he is a cutter and in Australia, I believe closer to Tentman than other suppliers(?)
Picking from the cutters inventory and not paying for shipping is the real key to good plain wood at a reasonable price. Nobody want to ship, or pay for shipping plain wood.