hhmmm...maybe we are talking about two different things here. The link you gave appears to be about spring "compressors" (tools to remove coil springs), & not spring "clamps", which were made for the purpose of lowering the vehicle. I did a quick search, and this is what I'm talking about:
clamps yes I realize its a Daewoo site, but it was a quick search & this is what I meant...don't want to argue about it, I've never used them, it was only a suggestion if someone wanted to look further into it