Ken,
The definition of an expert is as follows: An ex is a has-been and spurt is just a drip under pressure.
In '05 I stopped at the Crazy Creek HQ, in Red Lodge, Montana to pick up a fist full of catalogs for my summer workshop. I noticed that they offered a Crazy Creek version of the Sling-Light. It seems they probably got a license to build the chairs and sure enough REI had them on sale for about a year. REI hasn't had them in stock for some time now. I guess they didn't sell.
The Crazy Creek version of the Sling-Light uses heavier tubing than the original. Don't know what they weigh.
The Crazy Creek website doesn't show them any more but they're listed for sale at Target.com for $44.99.
I believe the chairs from Freeform R & D are made one at a time in southern California. I talked to the owner years ago and he said he sold about three or four hundred a year, year in and year out, with no advertising.
Manufactured since 1977 by
FREEFORM R & D
1539 Monrovia Ave. Unit 23
Newport Beach, CA 92663
Phone (949) 646-3217 Fax (949) 646-3218

Here is a photo of a group I was leading in 1995. Maybe the most Sling-Lights ever seen in one place outside the factory.