Just found out that even with the same version number, the stack solution release date could be different in different region. Therefore, the stack name for the same version could be different across regions.
For example, solution stack java 7 tomcat 7 v1.1.0. In ap-southeast-2 region, the stack name is 64bit Amazon Linux 2014.09 v1.1.0 running Tomcat 7 Java 7, but in us-west-2 region, the name is 64bit Amazon Linux 2014.03 v1.1.0 running Tomcat 7 Java 7.
The best way to find it out is to run aws –region <your-region-name> elasticbeanstalk list-available-solution-stacks –query “SolutionStacks”
Jackie Chen's IT Workshop 