Limbsaver for Knoxx Spec Ops NRS stock

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I am trying to find a Limbsaver to put on my Knoxx Spec Ops NRS stock. The stock came with a hard rubber butt stop. I have seen an 870 factory model with the Knoxx and soft butt pad at Gander mt. but I can't find where to get just the butt pad. Help.
Thanks

 

[ms6852]

I thought that stock was to help reduce recoil already. Do you need to reduce more?

 

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NRS model

I have the NRS model which is non recoil system. That is why I am looking for the pad