Schaller, Hipshot and Gotoh all make them.
Plus there are various no-name ones.

What are you looking for in it?
In the bass chat:

<Jon> take the quote of me out your sig plx
<Jon> i hate seeing what i said around lol

Leader of the Bass Militia PM to join!

And now on BANDCAMP!

Officially the funniest member of the Bass Forum.