Tried 4 of these so far at 179 smithing. No luck. Out of 12 pieces of imbued I've tried only one success (Legs!).
If you wanna make these get your skill up to (200) plus for any kind of success rate. Lava rocks are VERY RARE and hard to find.
If you wanna buy these remember that the smith had to skill up to 200+ to make them anywhere near component cost and will still have a failure rate.