I got it from a local bike shop here in Chch. https://bbbcycling.com/en/accessories/bottle-cages/BBC-35R This is the model I got. I used a small 500ml bottle with a push on lid but I had to shave the hinge off to make sure it didn't rub on the shock
Thanks, it looks pretty good. I recently tried to install a bottle cage on my 316 but it wouldn't fit. Where did you buy the cage from and also what bottle is that?