"Kelderman" and "Discount" go together like "Bigfoot" and "Space station". The chances of you finding one with the other is very slim. Kelderman offers a superior product for an equally superior price. You always pay for quality.
Save your money on that kelderman and have a shop fab something up for you. The keldeman lift is not the bible of suspension set-ups, like a lot of guys think. You can do a lot better for the money. I have never seen a used kelderman set-up for sale either, for what that's worth.
(I have never seen a used kelderman set-up for sale either)
If I had something that works as good as a Kelderman I wouldn't sale it. I think they are made in Iowa.