Trailing arm bushing question

[pritch]

I guess I blew it on this. When I removed the old bushings ahead of sandbasting and powdercoating, I didn't realize the outer steel of the bushing needed to come out:



My question is this: if I remove the outer steel shell of the new bushing, what are the odds of being able to press the new rubber into the old outer shell?

Or should I just bite the bullet and get the old ones out of my freshly powdercoated trailing arms?