This is a long shot but you might contact GB and tell them there is an error in the listing and that it is not a Javelina pistol and they just might let it be cancelled due to it not being an accurate listing.
Here is a Knight factory re-coil pad on eBay. Says fits Wolverine, not sure if it will fit your shotgun. New old stock.
https://www.ebay.com/itm/186315705474
We had a request from a member to set up a separate forum for shotgun muzzleloaders and we thought it was a good idea. So, with turkey season coming up, post away with your experiences.
I bought it from a member here a couple years ago. It is a little heavy but I like that, especially when using it in a shooting house with a rest. Very accurate rifle. I just have a sweet spot for a rem 700!
SWEET! Built in the true spirit of the Model 700! Remington 700MLS 26" barrel with Badger Ridge 209 conversion, Boyds thumbhole stock.
Here is a picture of mine: