the bailey 2 port one is just fine.
one port from under the turbo ni the block, the other from where the std breather comes from on the other side of the block (remove the std seperator first) and return the oil to the sump wherer the std one returned it to. no drilling or messing about required - just as it should be really. then yuo can either vent the breather fumes to atmosphere or to a catch pot.
do a search under my name and "breather" and you'll find all the pics you need