Arish Ashuvain Boots (F)

I've gotten my hands on a blacksmith manual for these, although the requirements are unstranslated. It asks for 4 iron ingots and 3 of another material that I don't know yet. Does anyone have any more info?

Any idea where the manual came from?

No, sadly. I bought it in a player shop for 199 (!) Gold. I'll try asking around and see if I can find out anything. I wonder if the manuals for Arish Armor are implemented as well...