^ The LES is a tailoring mecca. Rene on Orchard or Stanton Street Tailor around the corner will be able to do this easily, inexpensively, and well. I personally use Stanton, but I think for involved jobs the Epaulet guys use Rene. They're both great.
^ It is indeed the same fabric. The difference is mainly in the fits of the respective shirts. Also Gitman's button down collar is a bit smaller. Last, all Gitman Vintage shirts are washed and tumble dried once by the factory before shipping.
^ Unlined ties are fantastic, but are very much a style choice and aren't what most are used to. They work better with some fabrics than others, and in my experience should only be used with 6 and 7 fold construction.