I bet the cost of crate and ship alone would be $30k on this endeavor, not counting permits and sterilization of the wood, and god help you if the wood is a protected wood species.
I’d call around to museums in the USA. 90% of a museums assets are not on display. Surely a museum has a pile of them stacked up in the warehouse. Would a museum “gift” you one for a $25,000 donation or research grant? For certain if it could be done with propriety so it doesn’t look like you’re buying merchandise from a museum.