I could be wrong but I think you only got an E locker with a 4runner if it was a custom order. Tons of tacos seem to have them but i rarely see 4runners with them unless they were ordered that way.
I just bought a runner too....I saw tons of them with e-lockers...hardly any manuals though...just beware the 2wd models! dealers will forget to tell ya they're 4 wheel drive!