This is what the first design would look like (Assuming you wanted the background taken out and the shirt to be blue) on a regular tshirt. This could probably be done using an iron on graphic, which is sort of expensive, but not as expensive as if you wanted an embroidered design (which in this case would not work).

I tried the other two (the third might need a bit of retouching and then it would work) the second did not fair well on the shirt medium, mostly because of the gradient on the background, would make it pretty wierd to look at.