Go to a real locksmith. They most likely will even have a pentastar, or even original keys if they are old enough. And might even have the perdy ones to. It's worth the extra $$ to even buy a couple of blanks just in case for later.
Just pay attention if you're using ebay with the keys.. i messed up. The longer key is for my 65 dart, but the shorter one is for later models. Notice how the head is different. ALSO the trunk keys are different too. one is longer.. thats the only way to find out. Older dodges are longer, newer - shorter. I didnt snap a picture of the trunk key, but look at this picture, top left hand corner.. those are two trunk keys. One early, one late model..