Where can I get the sefer Ginas Egoz by Rav Herschel Schacter which discusses the topic of Techeiles amongst other things.
Also if anyone knows where to get his other seforim as well.
R. Schachter's sefarim are available at the annual YU Seforim Sale that takes place every February or so. Most of them can be read electronically through the Otzar Hachachmah database.
However, if you're just interested in the article on techeiles, which is only six pages long, those pages are available online via the techelet website: