I was going to do the home style of the Posi lock using the push pull locking cable from NAPA. I never got it installed and have since sold those axles. This is a 9 foot cable with the several feet covered in shrink wrap for better water proofing. You would still need the compression fittings and a few other misc. pieces. (google home made posi lock if your unfamiliar.
My loss your gain. Paid $34 plus tax and then I put on a few more $ worth of shrink wrap. You don't even have to leave your home.
$30 shipped to the lower 48
link to the Napa site.