Verses with the word breastplate in the Apocrypha (4 verses):

Wisdom of Solomon 5:18
He shall put on righteousness as a breastplate, and true judgment instead of an helmet.

Sirach 43:20
When the cold north wind bloweth, and the water is congealed into ice, it abideth upon every gathering together of water, and clotheth the water as with a breastplate.

Sirach 45:10
With an holy garment, with gold, and blue silk, and purple, the work of the embroiderer, with a breastplate of judgment, and with Urim and Thummim;

1 Maccabees 3:3
So he gat his people great honour, and put on a breastplate as a giant, and girt his warlike harness about him, and he made battles, protecting the host with his sword.