I was going to order one from southwest speed, but ended up ordering mine from Action Machine
https://www.actionmachineinc.com/pag...oke-order-form
I got a 3.5" aluminum with upgraded 1350 size U-Joints to go from 4L80E to my 12 bolt rear that I swapped to a 1350 size yoke. It didn't cost too much more except for the upgrade to forged chromoly yoke