The Larian armor quest is an easter egg (a hidden quest).
Did you solve the quest of the treasure maps ?
If not, i could give you more informations about these 2 quests with good links.

Yes the soldier in the lizard's house was one of them.
Now it is too late for this quest but if you play again the game you will use the magic mirror to duplicate the healing gem to be able to heal the 2 soldiers.
The second soldier was in the house of the dwarf Otho.

Barta

[Linked Image from squirrel.ovh]
duplouy.net badsquirrel.ovh
bad-squirrell.deviantart.com