Here's the site to Hiviz: http://www.hivizsights.com/content/category/category_28.asp

You can also get the same pad from Browning:
http://www.browning.com/products/catalog/accessories/detail.asp?value=024J&cat_id=117&type_id=4 0537

Cabelas has them for basically the same prices as the Pachmayer or Simms.
http://www.cabelas.com/cabelas/en/common/search/search-results1.jsp?_dyncharset=ISO-8859-1&hasJS=true&_D%3AhasJS=+&%2Fcabelas%2 Fcommerce%2FCabelasCatalogNumberFinder.giftCertifi cateURL=%2Fcabelas%2Fen%2Ftemplates%2Fgiftcertific ate%2Fgiftcertificate.jsp%3Fid%3D0005586990011a%26 podId%3D0005586%26catalogCode%3DIB%26navAction%3Dj ump%26indexId%3D&_D%3A%2Fcabelas%2Fcommerce%2F CabelasCatalogNumberFinder.giftCertificateURL=+&am p;QueryText=recoil+pad&_DARGS=%2Fcabelas%2Fen% 2Fcommon%2Fsearch%2Fsearch-box.jsp.form9&Go.x=21&Go.y=11&N=4887&a mp;Ntk=Products&Ntx=mode+matchall&Nty=1&am p;Ntt=recoil+pad&noImage=0

I have used the x-coil, but neither of the other two. I am just taking the word of a friend that was involved in the development.