I'm in the process of installing the KYB/GC system into my Pulsar, and for the rear mounts, it appears there's supposed to be a urethane bushing that goes between the spring plate and the uppper mount! I don't have this bushing!
It can be seen in this pic from NPM:

^I'm assuming that's what it is... All I know is that in the GC installation instructions that came with the kit, it shows a urethan bushing there.
Where am I to get this piece? I'm assuming the kit isn't supposed to come with it.... I'm using the KYB AGX Sentra struts, and the Sentra GC coilover kit. Is this something I can get at an autoparts store?
I need to know soon, I want to get my car back on the road this weekend!
Thanks.