Hey friend!
Did you check
this thread yet? According to it, the mentioned Acacia melanoxylon (careful with spelling to find more info) has quite small amounts of DMT generally but there may be variation between individual trees and varieties within that species so you might get lucky, could be worth a try. Also check
this FAQ entry on how to proceed to find if it has alkaloids of interest
I'd definitely try to find different Acacias in your area, apart from the one you mentioned, and make small tests with them see if they contain alkaloids of interest. Please harvest them sustainably.
Let us know your results!
Good luck!