These are OME HD coils with OME struts compressed with NAPA McPherson strut heavy duty compressors. They have u-bolts that bolt directly around the coil. I taped the area of the coil that came into contact with the u-bolts to prevent the paint from rubbing off.
It took me quite a while because I just used the wrenches in the photo to crank the units, and bolting up the u-bolts and then unbolting them takes time too. In the photo it looks like the compressors are bent, but what's happening is the brackets are tipped slightly: the inside diameter of the bracket it slightly bigger than the diameter of the main bolt.
I feel these are very solid compressors and they did the job for me with one caveat: the u-bolts only allow the compressors to compress the springs to a certain extent, which turned out to be about half an inch shy of clearing the bolt on the strut. So I used two big bar clamps and compressed the last bit by clamping the entire coil/strut assembly.
It's up to you if you want to tackle this type of method. It's probably easier and not too expensive to get a shop to do it: I couldn't find anyone who wanted to do this for me, so I did it myself.