First, we have a plain black velvet choker, which even has a style all on its own. It give you a simply elegant look but can also fit with any added accessory. It has a thick and firm clasp, which seems to hold very well. If you do not like the plain look you could always find something decorative that can be super-glued on.
As of 10/03/2016 they can be purchased on Amazon.com for $9.99 with free shipping with Prime.
I did receive this item for free for giving my honest opinion. All opinions are those of my own.