There is a special tool that can be used to remove and press these back in. I'm not sure where PP is getting the idea you can use a hose clamp on the split one... cause that is a joke. Even with the specialized tool, it is a serious pain in the arse to keep those four (two on both sides) lined up.
There is a company in Europe (
https://www.strongflex.eu/en/) that actually makes replacements for all the bushings in the rear end. Many don't make the two center ones that are in the subframe.