It will not do any good to just put the axle seal in, it will just blow it out again. The problem is in the inner seals. Do the whole kit.
#5
StarTech
Google seal kit PN 500444004 which is for the Dixie Chopper 200049, 200050 White RE530 T series wheel motors. Amazon has it for $100 with free delivery option.
And the kit includes a bearing.
Also would recommend ordering the Front housing bearing PN 530018000 as the above kit only contains the Rear housing bearing.