I have a complete rear end setup from a GT-R for sale that I brought back from Japan a few years back. It's a great, reliable upgrade for the S13/14...includes rear diff with output flanges (will fit in R200 pumpkin), half shafts, and rear knuckles/hubs/shoes - half shafts and knuckle assemblies still packed in boxes I got them in when in Japan.
$600 + shipping
https://postimg.cc/9Ry49gtM