How do I get it off and where do I get one??????
Take it to Enduro Trailers, on North Kiowa, assuming you're in Havasu. If you aren't he may be able to help you over the phone. For some reason I can't find his number, but look in the yellow pages.
Usually the spindle is mounted to a arm that is splined and that splined arm is then mounted to a male splined stub shaft that is mounted (vulcanized) to the rubber torsion inside the axle tube.