For anyone that's ever looked for a tank extension. I've finally found one. Looks like on the webike.net link you can specify non-carbon versions.
http://www.moto-works.jp/bikes/2015-s1000rr.html
https://japan.webike.net/products/20378067.html
http://www.moto-works.jp/bikes/2015-s1000rr.html
https://japan.webike.net/products/20378067.html