Has anyone ever found the Fire Gear and Fire Check armors for Ryu and Nina?

I know some enemies drop a Fireproof for Lin (and the best one, a +5, is in Kokon Horay), but what about the other two?

I think I found a +1 Fire Gear/Check in the Old Waste Shaft once, but I can't for the life of me remember which gold box it was from. I've only found Impact, Bind, and Poison armor otherwise there, and it's frustrating me.

So if anyone has found them (and remembers where)...where?