Happy Hunting! I love the R18B. It's easily one of my best purchases. That being said, I'm actually picking up a T120 Black this weekend to add to the stable
Here are the part numbers for the black crash bars. The dealer had them in stock, but on the BMW motorcycle site, it says they are no longer available for purchase.
77145A6A0C4
77145A6A0C3
I was getting numbness in my left hand, which I've never experienced before riding, so I'm sure it's because of the vibrations. I installed Grip Puppies two days ago, and it significantly reduced the vibration in the grips. It's not gone, but it feels much better now.
I searched high and low for other places to order them, but you can only get them at the dealer. I got a discount from the dealer I purchased the bike from, which helped a bit. It was expensive, but it was worth it as it completed the look I was going for.