If you or someone you know is handy with a torch you could slice those bushings out. put the torch head at angle that is almost parallel with the bushing and hit the O2 as soon as it will cut. once you have a slice in it you can drive the sidewall of the bushing toward the center with a hammer and punch or chisel.
If you have access to an air chisel you could try collapsing the bushing into itself.
You could also use a die grinder to thin the shell where it passes through the A-frame and collapse the bushing with a hammer and chisel where you thinned it.
You could use a hacksaw or sawsall to slice the bushing.
You don’t need to save the shell so don't be afraid to get after it. Just be careful not to hurt the A-frame. What have you got to lose?
