has anyone made a oil separator to replace the pcv valve?

i am thinking about making one setup so that there is a drain for the oil back into the crankcase. but i would like to know if there are any good designs floating around.

 

How to put a 6 speed ZF in a 2wd IDI - Diesel Forum - TheDieselStop.com

does anyone know how the bracket he made looks? i can't figure out how he made the bracket for upper two bolts without milling off part of the block

 

I found a pic a while back of one that someone made. I'll have to look again later and see what I can find...