Super stock leaf spring bushings

I picked up a set of used SS leaf springs. Been looking through GOOGLE but cant find a Mopar performance part number for the bushings. I know that they can be bought from Jegs etc, but up here in Canada it is not uncommon for the part to be cheaper, after shipping and exchange rate, to buy at the dealer. Can anyone help me with part numbers. The front bushing has a bold dia. of 5/8" and the eye ID is 1.5". on the bushing end the ID is 1". Also would you go Poly or rubber. This is a street car not a race car

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