I installed a mann provent on mom's 2001 golf TDI. I installed the provent beside the oil filter using a mounting strap I fabricated by bending 5/16" ready rod, then covered with rubber hose. To get a little more clearance for the unit in this location I shortened the upper radiator hose by about 1/4" or so. To plumb the provent in, I siliconed in some copper transitions to the hose nipples to adapt them to 3/4" ID hose, and I ran the hose around the passenger side of the oil filter then through the fuel injection hardlines and up to the top of the head.
I can take some pics if anyone's interested.