I just checked fcp euro today and they say its backordered.
We're in Wisconsin, and my dad did get one ordered on Summit, but that one was delayed by a month, and may be here by next weekend? It just seems like all the Luk clutches are on backorder, and the aftermarket replacements are spotty on avalability.

We did look under 2002 SLK 320 for them too.

The slave cylinder and clutch master seem to be in stock (I may have broke them - lesson learned lol). We were just having difficulty finding the clutch & pressure plate or full kits.