Draw a sectioned profile of the part, with a construction line where the center of the part should be. Revolve the mass around the central line. Done.

Step two: Insert a single roller into your mecanum wheel, and circular pattern it the appropriate number of times around the wheel's axis.

Remember, CAD is supposed to do all the hard stuff for you. If you find yourself doing a repetitive task, there's probably a tool that does it for you in a single step.