Thank you for your question. In the Texas area there is:
John A. Buxton
6717 Spring Valley Road Dallas, TX 75254 ,
He well known but very expensive.
Another contact is:
Vanessa M. Elmore
Camino San Patricio Santa Fe, NM 87501
She is more of a generalist but does Pre - Columbian
If you are considering selling the pieces you can also contact an auction house for an estimate.