Ankheg Armor

Has anybody else had trouble getting any armor made from Ankheg shells?

[spoiler] The smith in Beregost buys them and talks about having one on the tenday, but I never receive a dialogue option to get the armor. [/spoiler]

I can get by without it, but it's definitely useful for lower strength (Viconia) armor-wearers. I asked Jaheira to let Vic wear hers, but she wasn't too warm to the idea...