IMO, Not disclosing the type of wood is probably just a way to protect a patent or copyrite.
If the type of wood REALLY is that important I feel sorry for those who fall prey to this type of marketing voo-doo. Should we all buy the same carpet, wood flooring and furniture to adorn our listening room so that we all have the same environment??? I think not!
I challenge anyone to listen in a blind set-up and tell me the difference.
All you are really doing is breaking up the sound wave that travels towards the first reflection point. (getting first ref point under control or eliminated is widely known to improve sound quality on several different levels I won't get into).
Build your own design with an eye towards what works in your budget.
I have no doubt that you will be just as happy with the results, if you "Think" it makes a difference.
Happy Building!