I need to buy another bow, I have only had my current bow for about 15 or so years. Of course I will buying a used bow. I am a finger shooter and I have seen some used Matthews bows that I like but the draw lengths are not my length. I have dome some research and it sounds like I can get different cams for certain models but where can I get them? Does a dealer have to order them for me? Thanks ahead of time for any info.