Eureka Miniatures have released a set of 28mm South American Tupi miniatures.
From their website:
The Europeans used the name Tupi as a convenient term to collectively describe the numerous tribes who occupied the long Brazilian coast, from the mouth of the Amazon to at least as far south as modern day Sao Paulo. Although linked by a broadly common language and cultural similarities the Tupi were comprised of many different tribes, with their own subtle but distinct identities. These included the Tupinambá, Tupinikin, Tupina, Potiguara, Creté, Tobayara and the Temiminó tribes, along with all their various subgroups.