Thanks! I dont really want to sell them...although it would be an easy money-maker. I'd be willing to email the original pictures I used to anyone interested. PM me your email address, I'll send them. The tough part is making sure they're the right size. I had to print mine off three times to make them right, even though I measured... From experience, if you want to do this, follow these steps:
1.) remove your current stickers (drill out the rivets, then just peel them off. They come off kind of hard but you shouldnt need anything more than a screwdriver to pry up the edge a little.) Rub off any adhesive that is left on. Two of mine came off good, the other left adhesive on the plastic but it rubbed off real easy with my fingers
2.) Once you have the pictures, print them off (preferably on cardstock or thick paper), line them up on your plastic before cutting them out or laminating them. that way, even if you're off by a little, you can cut them a bit smaller if needbe. These fit way better when they're a bit small than a bit large.
3.) After you've lined them up and measured, cut them out and trim to your preference. This isn't a high-tech step. a ruler, pencil and scissors is all you need.
4.) Once they're the right size, laminate them. The heavier the laminate, the more durable they'll be.
5.) Line them up and poke or drill holes to match the old rivet holes. I used a Sharpie on the back side and then used a drill for the holes, but you could just as easily use a sharp nail or something, as long as the holes all line up when you're done. To secure them I used little 6-32 screws with nuts on the back, but rivets would work great too. I didnt have any rivets handy, so i just used the screws and they work just fine. Also, they dont rattle loose because they're tightened against the plastic, which acts sort of like a nylon lock nut anyway.
Try to avoid bubbles and wrinkles (try doing step 5 one hole at a time. drill/punch it, then screw/rivet it, THEN do the next hole, keeping it stretched tight the whole way. )
The pictures I send you may or may not be exactly right, so make sure to check it before printing. (I found that emailing pictures sometimes changes the size a little bit)
Looking back, those are the things I would have done. It's not a complex procedure but I tried to highlight the things that would have made it easier the first time. Keep in mind that these wont last forever, and probably won't fare well with water/mud saturation, but they dont cost much and are easy enough to do in your spare time.