“ancient Egyptians had access to this Southeast Asian resin via long-distant trade”
Long distance trade has been around a very long time. Inuit in the Canadian arctic had Viking-made products long before the Inuit and Vikings ever met.
https://freerepublic.com/focus/chat/3675803/posts
https://freerepublic.com/focus/bloggers/2684571/posts
Or the trees were more growing in a wider area than thought?