The install depends on the local labor rate. Here in Cali, it can be from $500 to $800. Shop around for the parts, as the cost can vary. If you order online expect to pay in the neighborhood of $300. Your local VW dealer will be higher.
You will also need to buy a new set of stretch bolts to attach the flywheel and clutch/pressure plate. Do not reuse the old ones. A set of replacement bolts will run about $30.
A suggested vendor is
www.dieselgeek.com Just give Jim a call, and he will be sure you get all the right parts. Also ask him about his metal skid pan. It will save your motor the next time you run over road junk.