People have been asking an easier way to access the latest available builds for 2.x series.
I will leave here the most updated version available for ES 2.4.5.
https://readonlyrest-data.s3.amazonaws.com/tmp/readonlyrest-1.15.1_es2.4.5.zip
https://readonlyrest-data.s3.amazonaws.com/tmp/readonlyrest-1.15.1_es2.4.5.zip.sha1