Avarri in Lull-Mor, Smithery is selling them.
If Avarri doesn't sell you anything, go to The Wheels of Lull - Bugs Workaround.
All equipment from The Wheels of Lull can be tempered with a Technomantic Ingot on a grindstone or workbench.
Avarri in Lull-Mor, Smithery
Lull-Mor Upper Level local map