You should be able to replae the boots alone without pulling the axle nuts/outer joints. Just disconnet at the gearbox, and you can cut off the old boots. disassemble the interior joint, then slide outer boot on before the inner boot. regrease & reassemble.
Having said that, the axles themselves are available from trakauto on rockauto for $87 a pop... I'd maybe just replace them both, as assembling the joint after replacing the boots is probably more work than just replacing everything.
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