Available in Rapidshare, the two versions of the Field, Frederick edition.

Included too “A handy concordance of the Septuagint : giving various readings from codices Vaticanus, Alexandrinus, Sinaiticus, and Ephraemi, with an appendix of words from Origen’s hexapla, etc., not found in the above manuscripts (1887)”.
Available via Rapidshare, here:

http://rapidshare.com/users/T3K2D4/4

Salus!