Heres what they had to say.

Hi Dan,
Although we don't sell very many of the 40" Sound Rings we have sold a few so they don't have the only one.

Unfortunately I don't have information on which dealer may have one but they can order one for you using the following part # 54006.
Suggested Retail Price is $753.00 us$ Keep in mind that this is a Suggested Retail price. Most dealers offer a discount some more than others so it pays to shop around

Customer Service
Sabian LTD
www.sabian.com