I have an SX610 in my hand right now and I can say for certain that the SX610 part won't work due to the angle of the dangle of the drop parallelogram design.

When I had the same problem, I contemplated silver soldering the parts. I never got around to trying it.

By "sleeve", you don't mean #3561 do you? That's what I would call a sleeve and it has nothing to do with the problem.