The National Archives has info on this (but I didn't see a roll number):
Enrollment for Choctaw Census Card 2877
ARC Identifier 621837
The info is for late 1800s for the Choctaw nation (which is located in Durant).
Good luck
http://arcweb.archives.gov/arc/action/ShowFullRecord?tab=showFullDescriptionTabs/scope&%24searchId=2&%24showFullDescriptionTabs.selectedPaneId=details&%24digiDetailPageModel.currentPage=0&%24resultsPartitionPageModel.targetModel=true&%24resultsSummaryPageModel.pageSize=10&%24partitionIndex=0&%24digiSummaryPageModel.targetModel=true&%24submitId=1&%24resultsDetailPageModel.search=true&%24digiDetailPageModel.resultPageModel=true&%24resultsDetailPageModel.currentPage=0&%24showArchivalDescriptionsTabs.selectedPaneId=&%24resultsDetailPageModel.pageSize=1&%24resultsSummaryPageModel.targetModel=true&%24sort=RELEVANCE_ASC&%24resultsPartitionPageModel.search=true&%24highlight=false
This census card contains information about the following people: Washington Tolbert (Choctaw. Age: 30. Sex: Male. Degree: Full. CC Card: 2877. Roll Number: NR. Post Office: Summerfield); Elizabeth Tolbert (Choctaw. Age: 20. Sex: Female. Degree: Full. CC Card: 2877. Roll Number: NR. Post Office: Summerfield); John Tolbert (Choctaw. Sex: Male. CC Card: 2877); John Adams (Choctaw. Sex: Male. CC Card: 2877); Nellie Tolbert (Choctaw. Sex: Female. CC Card: 2877); Seal Adams (Choctaw. Sex: Female. CC Card: 2877).