GA 2002 se Trailing arm bushing

Hi
Small massive issue. Trailing arms bushings are worn out on my car. I ordered some new trailing arms since the bushing don't come individually. Surprise! It do not come with all of them! Can't find the last one!

The trailing arm is a kind of T, the "upper" part have the bushing. The lower part is where the problem arrise: arm, washer, bushing... that's what it come with. Now it goes in the nuckle (I think it's the name), then another bushing and washer come in, then a bolt hold all in place. Mine is worn out/cracked, so can't reuse the old one*. There is no listing anywhere (need to call the dealer again, but their price tag is frightening....)

Does anyone have a solution or a source for those bushing?

See the attached pic for reference, need the one just before the bolt.

That bushing may be part of the knuckle.....

You can get one from GM. gmpartsdirect.com.

Ended up going to the dealer, 10.05$ each.

Fortunatelly they had it in stock, at the second place...