Hi Jason, apart from stating the obvious, it is no good replacing the end-caps on a worn axle....the part is available but $$...I have seen a shaft built up to spec over the worn sections with weld and then reshaped by filing.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl