Just came across this (via youtube) seems like a good option for anyone who has broken an r1150gs lens 
https://doctorlight.pl/oferta-modelowa/
https://www.youtube.com/watch?v=-DN_r_DCiIM&feature=emb_logo

https://doctorlight.pl/oferta-modelowa/
https://www.youtube.com/watch?v=-DN_r_DCiIM&feature=emb_logo