Why does your shirt keep changing?

My novice Photoshop skills aren’t quite up to recreating this from scratch, whatever it’s “supposed” to look like in the first place.

I really don’t want to have to commission someone else to make this, or even worse, redo it myself in MS Paint to get all the curves just right. I’m a total Photoshop novice and don’t really have a knack for this sort of thing. I don’t know whether to fuss over it for a few more hours (er, what should be minutes if I knew what I was doing) or to just go with what I have.

UPDATE: Got the finished product in the mail from Broken-Arrow.com, and I’m pretty pleased with the results. I’ll admit that I cut corners in so far as getting the design 100% accurate but I think it captures the main idea of it pretty well.