I know they were switching over servers this past week so it's possible that your email got lost. Email Andrew directly at firstname.lastname@example.org
. As long as the email gets through he should be back to you within a few hours. Otherwise post up a thread in their section of the forum saying what you want and hopefully one of them will get back to you pretty quick.
33" is stock size on 1500's. A 285/75/17 measures 33.8"x11.2" That's only 0.4" bigger around the diameter of the tire. You'll clear those no problem.