eBay has new Style 128 21" wheels (OEM) for $3000.

Finishline Wheels is about $1300 (OEM but reconditioned).
BMW OEM RIMS BMW FACTORY WHEELS STOCK RIM CHROME REPLICA WHEEL USED RIMS BMW Wheels BMW OEM RIMS BMW FACTORY WHEELS STOCK RIM CHROME REPLICA WHEEL USED RIMS BMW Rims

I've not seen any Style 128 Replicas

__________________
2011 BMW 740i
2011 Toyota Sienna Limited
2008 X5 3.0 Space Gray (sold)