It's the compound leaves that remind you of honey locust right?
I don't have a picture on my phone, but you can google lennards bonsai beginnings, the guy loves training senegalia's. oh btw... we still call the genus acacia due to our stubborn nature here in africa

so when you search for trees of this species growing in the wild search for acacia burkei or acacia galpinii
to give you an idea of what i am aiming for:
the tree will have a wider canopy than it is tall, it will be a rounded open umbrella, but! this is where the kink comes in. the primary branches have to make angular bends(90 to 100 degrees) have taper, the same goes for secondary and terciary branches...to pull this off takes a long time. years and years of letting grow and cutting back hard to one bud every month during the growing season.
kind regards
Herman