I think they are around $160 up... maybe a little higher...

the cheapest one has an oil cooler plus the adaptor that sits on top of the engine where the original oil cooler was located
- You have to buy 4 hose fittings plus hose...

another , same as above plus it also has an oil filter adaptor for a spin on oil filter, You would need two more hose fittings for this...

another: same as above plus it has an oil temperature thermostat adaptor.... which is good for the engine....

especially if Your engine doesn't have a thermostat...
Most don't.. they were removed by VW mechanics during servicing-