So, I got a response from Libbey.  I was told that there would have to be an order of at least 80,000 pieces (more than 2,000 cases) for them to bring back their best sour goblet ever, #8475, Citation Sour.  I asked if they got a single order of at least 80,000 pieces for #8054 (‘Georgian Irish Coffee’) that prompted them to bring that one back last year.  I was told “Yes.”