Since jimmy doesn't ship to California, I made an enquiry through WIngstuff. This was their response:
"Hello Simon,
I got hold of Torq Master and asked you question of them. The Inverted King Snakes are available in Black Nickle, but are a special order item and will take at least three weeks to manufacture before they can be shipped. Price of the mufflers are $899.
If you have an interest, please give me a call at the number below."
$899?