It may be possible to draw the bushes out, and in with following components.
1. Suitable length of screwed rod, or a long high tensile bolt, that will pass through the bush
2. Minimum 3 nuts for the screwed rod (1 for bolt).
3. Thick washer(s), marginally smaller in OD than the bush.
4. Short length of tube, with square cut ends, to draw the bush into.
5. Larger diameter thick washer to cap the tube.
6. Grease for the screw thread, and nut face.
Many years ago, I used this method to replace some suspension bushes on a Saab 99.