answer:If you can find a friend to help you with the sewing task, you can replace the buttons on a dress shirt with hidden bits of velcro. As long as you wear a tie with a tie-pin to keep it in place, no-one will notice. As for the suit jacket, get a single-breasted one, remove the buttons and wear it open. I really doubt that anyone will check your jacket to see if your buttons are intact. (Interviewers look mainly at your face, hands and shoes). ETA: cuff buttons can be replaced with cufflinks.