You can't put frames from other markers on cockers. If you want an E cocker you will need either a worr blade or an Eclipse E frame. As far as cheat bodies, go on Ebay and you can get a prostock body, vasa, frontblock, and lower internals for around 50$. Then you need to find an Eblade kit, and pneumatics. As well as reg and asa, and any other parts I forgot about.