Matt,
Attached is the Entergy-Koch/ENA ISDA Master Agreement you requested.  Let me know if you have trouble accessing the document.

Stephanie  
 
 http://edms.livelink.enron.com/ena/livelink.exe/96057022_Base_Contract_02_01_01_A.pdf?func=doc.Fetch&nodeId=10191237&docTitle=96057022+Base+Contract+02%2F01%2F01+A