I've just finished putting polys in my panhard rod this morning
One of the old bushes fell out with a light tap
The other one, i used a drill to remove the majority of the rubber, knocked the center sleeve out, the used a hacksaw to cut a slot in the outer shell, a few good blows with the hammer and out she came
New ones were a bit of a fiddle to get in, mainly due to only having two hands, and having to do the vice up with my knee