The inner ‘Flambloc’ bushes can be pulled out with a similar technique as the outer ones. My rear inner bushes were in a really bad state; some of the rubber was literally falling out!
The first job is to cut the end off the old bush. If the end is not cut off, the rubber inside deforms when compressed and makes it harder to pull through the wishbone. Cutting takes a few seconds with a reciprocating saw. Make sure the cut is perpendicular so that the bush will push out straight.
Since these types of bushes are spot-welded in, the welds need to be ground off. The best tool I have found for that is a Dremel with one of these wheels:
With the welds ground off, the bush is in theory, removable. Time to assemble the puller once again using the M12 bolt, washers and the 46mm socket as the receiver. In this case an 18mm socket was the perfect size to push the newly exposed outer edge of the bush.
The old bush comes out out with very little effort: