For Brunei, you may have some luck with azmanoud. He seems to have quite a side stock of rarer and less common woods. Right now I know most of his stock is fili woods - but I've asked in the past about sinking grades from other regions and he's sent me various stock lists and prices. You'll prob pay 30 and up a gram though for woods that are more of a vendor head stash.
PS. I'd love to see the Tony Bolton sinking Borneo pics if you have any. I know it sells for 30 a gram so I'm curious what it looks like.
@Habz786 - you truly spoil us. For 20 a gram with you, we are getting these epic 5+ gram stones of wood that smell awesome. 20 bucks a gram anywhere else doesn't even come close to the same quality/price ratio. I can't justify spending much more anyway - I always have to ask myself, is that 60/gram wood going to smell 3x better? Maybe but it will certainly go over my head! Would rather score 3x as much wood
🙂