Shock Absorber Bushes

Hi to all AGAIN! ok todays issue is that I am trying to take my rear shocks off to give them a good clean up on the bench but the bottom bushes are seized onto the swinging arm boss. Before i wreck the rubber bushes in order to get some purchase on the inner steel sleeve does anybody know if replacement bushes are available?

Thanks in advance for any info!

 

Callumity you are so amazing - first there with an answer once again THANK YOU! Currently soaking in Plus Gas so will take a careful approach first!