Peter, I've got 4 pretty large red mallee burls that have been in my garage
shop for about 8 to 9 years. I would be willing to contribute a couple of the larger ones for you to look at\experiment with if you would like to. These are whole burls cut off the side of the tree. Meaning they have one cut side and the rest is not exactly bark but the rough exterior. Burls as you probably know are kinda like a cancerous growth that looks like a lump on the side of a tree. These have been waxed on the cut side which allows them to dry really slowly, not through the cut side but through the rough side. Results in a slow controlled drying. One of them is really big and would probably yield at least a half dozen
mods after cutting. Don't want anything in return except if they turn out to be good usable wood save one or two for my runs coming up.
The rest you can divvy up as you see fit. I've made some bowls out of some similar burls and the grain is beautiful.