I'm not sure what part you are looking for? Are you looking for the rubber cones that go inside the coils? Or are you looking for a spacer to lift?
You can pick up the spring rubbers that your describing at any advance Napa whatever. You could also get a Daystar 1.5 inch spacer for like 30$? And it would help. I would go with the lift spacer myself as I would imagine the rubbers stiffening the suspension a bit.
I have searched everywhere for 1 1/2 inch spacers. Any idea where I can get them.