Any AA ticket counter can handle it but many will duck and run when they see it. My last reissue with AA took 7 hours. Typical is 2-3 hours. The 7 hour one was that short only because everything was prepared in advance, including pricing and tariff mask (but had to hand write it). The official policy is that airlines can require 24 hours for ticket reissue, so if this matters to you maybe best to do it the day before. Fastest I ever had was 15 minutes by CX in HKG, but I had faxed in my ticket the day before so everything was prepared before I got to the airport. Fastest by AA was at LAX in under an hour but there were only 3 segments left on the ticket! Still took an hour, and the agent was working hard the whole time.