Try this.
http://www.am-autoparts.com/BMW/335i...40/804698.html
It's not BMW or Bosch branded, but they work. When my car started misfiring, I changed plugs and used these coils and it's been great since. I know a few guys running these and they've had no issues either. Plus it comes with a 10 year warranty if they fail, only cost to you is shipping. I think the warranty itself ms worth it. They shipped super fast too as I was short on time.