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$200 for a clutched pulley?! They're about $35 for a VW, and can be changed in the car most of the time (little clearance is required) if you have the correct set of tools. There's a double splined tool set for this (the outside one engages the pulley splines, the inside the nose of the alternator) and with them and two wrenches it will come off quite easily -- unless it has seized, in which case you may have to remove the alternator and chuck the inside tool in a vise.
I believe INA or Litens makes most of these at the OE level and I bet they're the same on darn near every car that has them. If you have a CRAP (Chinese Replacement Auto Parts) alternator on the car it may have some third-party pulley on it; if so get it out of there and put a proper one on made by a decent manufacturer that will last more than a year. I've needed to replace one on my VW ALH-engined car, it was under $40, the replacement is still in service and so is the original alternator -- with 230,000 miles on the vehicle.
A lot of places will try to sell you an alternator when these fail and then they'll put some aftermarket rebuilt alternator on which is utter garbage and will fail *again*. I had a VW stealer try that on me and they wanted over $1,000 to change it; the "book" way to do is basically to pull the front clip including the radiator! However, it *does* come out the bottom on those cars if you pay attention and if the pulley is all that's bad it's a 20 minute job with it still mounted. They didn't get $1,000+ from me; I bought the tools and pulley for under $100 instead.
BTW check the tensioner and shock very carefully if this has been going on for a while. When these pulleys fail there are multiple ways they do; one of them is that they will lock up a good part of the time and that causes the tensioner to bounce a LOT, which will quickly destroy the shock on it. The other two ways they fail are "open" (don't lock either way, and is usually quite noisy, sounding sort of like rocks rolling around inside it) which results in no charging of course, and then the really ugly way -- the pulley comes apart with the engine running and you hope the pieces don't go somewhere important and cause a LOT of damage on the way out.
Last edited by tickerguy; 02-17-2018 at 08:56 AM.