I purchased a GRAFLEX CROWN GRAPHIC SPECIAL 4X5 CAMERA WITH 135MM 4.7 LENS serial number is 944604 and it did not come with a film holder. I have been researching holders to buy and one buy said that I need to check to see if yours requires a holder with a groove on the edge, if so, this will not fit. what is the recommended film back for this camera (I do not have a manual yet for this camera either, just purchased that as well)

Being your camera is a late 1960 or early 1961 Top Rangefinder Crown it will most likely have a Graflok back.
It will use standard double sided film holders.

http://www.cameraeccentric.com/html/info/graflex_4.html