Go into this thread: http://www.newschoolers.com/ns/cult/forumthread/thread_id/463577/
Find the members who seem to be doing a slightly more professional job (i.e. making multiple sweatshirts often, not that other members aren't making high quality sweatshirts, but some members are making them in a more business manner rather than as a hobby) and shoot them a PM.
This cult (from what I've gathered) wasn't created with the intention of people coming in with requests of what they wanted and a few select members making them, but as a guide on how to make your own sweatshirts.
And while you can find someone who would most likely make you one (and it will usually range around $40-$60), I would personally suggest learning to make your own. Once you get the hang of it it is a lot more rewarding, and you can make sure it is exactly how you want it to fit, instead of trying to relay sizes and how you think you would like it to fit.
bitches love it when they can see my dick bulging against my outerwear. they are all like "is that a sandwhich for later?" and im all like "no, that is my massive penis sandwiched between the tight fabric of my pants and my inner thigh" - pomme-de-terre