Just got two of these for my vwh and wow they look sharp. The abalone tops look great and really make the neck pieces stand out more.
One of the things I liked about the vsbl was the metal knobs so I figured 'someone' had to make some gold ones. Finding the abalone tops was a bonus!
There are lots of places on the web to get these. I used
http://www.greggrogersguitars.com/knobs_new.html