Spring Help!

[Critter]

These springs came on the front of my K5 when I got it. Of course they weren't this pretty, I brushed them up and put a little paint on them. From measurements that I have taken from other people, they seem to be 6 inch springs. 1st question, can anyone tell what brand they are or if they are from another vehicle of something? 2nd (my main question) Has anyone else had trouble removing this type of metal sleeve from a spring eye? This thing is killing me! Me and Jtrux have tried everything we can think of...BFH, sawzall, air chisel, you name it, THIS METAL IS HARD! The only thing left that we can think of is taking it to someone with a mill and have it machined out. At first I thought I would just have to collapse the cylinder and it would fall out, but it seems like the two metals have grown together at this point. By the way, the other side tapped right out of the spring with a screwdriver and claw hammer. Any ideas/tricks?