I bought some great Ching slings from Andy Langlois -
http://www.shottist.com/
I realize you're not looking for a Ching Sling, but he's very responsive and knowledgeable - you might want to send an email to him to find out if he can help you out with either his own product or a source. Good luck.
[This message has been edited by Jeff Thomas (edited September 28, 1999).]