I also live in the US!
I attempted to make a Do Not Enter sign by simply changing the .dds file. But, something is wrong. I don't know how to explain it, but put the attached file into where all of the signs are (stated above). ****FIRST***** Make a backup of the original file so you can replace it later!!!! The place my version and take a look at whats wrong. If someone could tell me how to fix this, then I will be glad to make more of them!
EDIT: Your going to have to make the attachment a .dds file yourself because the website won't allow me to upload it as a .dds file. To save, right click the picture and click Save link as... Right now its a .jpg file, but if you open it in MS Paint and click Save As, you can change it into a .dds most likely (I used paint.NET)
Thanks!!