Ernie Carlson was a friend of mine and was trajically killed almost 3 years ago testflying a Storch he was preparing to start manufacturing kits for. No reflection on the airframe design, but the Czech engine has giving them "fits" for months. The factory had just FINALLY supplied a new one to replace the "Lemon" they'd first sent him, and on the first takeoff at his own strip, the new engine faltered, failed, and Ernie was killed when he tried to "zoom" over the tree line at the West end of his 4000' or so strip. He missed making the open field on the other side of the treeline by a couple inches, the aircraft landed snagged in the trees and on it's back and burned. Ernie was heard to still be alive and kicking when eyewitnesses where on the way to the wreck, but he was trapped upsidedown and died in the fire.
Mary, his Darling wife, continues to operate Carlson aircraft in his rememberance. Last I knew, all the same "crew" is still there and they are keeping the Wolf from the Door quite nicely building and selling the Sparrow Kits, etc. About a year ago, their ribs were selling for somewhere around $45 US apiece on the average, but are probably slightly more by now. They're good looking pieces.
They're a five-day business, so call Carlson Aircraft (S.R. 14, East Palestine, Ohio) at 1-330-426-3934 9:00 to 5:00 Eastern any weekday and talk to Mary. They have several ribsets available and will sell singles if you want. Mary probably won't need to put you on hold to look something up. She's "sharp".