Design graphics for humorous t-shirts

I sell shirts on EBay that are humorous/offensive. The shirts are black with solid white graphics on them. The shirts are along the lines of T-Shirt Hell stuff (Google it for examples). You should have a sense of humor or at least not be easily offended if you want to work on this project. I'm a skilled Photoshop user and up until now I've designed all the shirts myself. Some shirts are just text and some are text with a picture. Obviously the shirts with the picture are more difficult to create. I've actually got my own technique for creating t-shirt graphics in Photoshop that I can share if necessary. I need a graphic designer to design t-shirts for me in batches of ten and then send them to me via email or FTP in high resolution Photoshop files. For each t-shirt design, I can provide either a written description of how the graphic should look or a thumbnail sketch of approximately how it should look. If you've done design similar to this before and can show me your work that would be great, but that is not required. I may have you do a "test design" before I hire you. Also, this project will be a batch of 10 shirts and if I like your work I will probably hire you for more batches. I've uploaded a couple of my designs for examples. Speed is essential. If you work quickly that's a huge plus.