There is now a copy of the Brenton translation of the
Septuagint, with many spelling and word usage updates, available
for free at http://eBible.org/eng-lxx2012/.
The World English Bible Apocrypha will be based on the RV
Apocrypha, except for 3 and 4 Maccabbees, which the RV lacks.
Those will be based on the above-mentioned LXX2012.