There is a set that is used on the extra long scales, and the E is about .96 gauge. Unfortunately it is made for 36-37 inch basses, and used even with my body thru American Fender P Bass the string part past the silk still wraps around the post. While this is usually a no-no, it hasn't broken yet. Probably due to its flexibility. It is found in the JF364 set.
Also, you can get the string by itself from the stringle strings section of the site:
http://www.juststrings.com/flatwound...lestrings.html
TIs are unique strings, especially thier flats, and it might be hard to find another brand's string to match up tonally and have a similar feel.