I know a lot of folks were searching for these files, and someone posted an updated design that's even better than the one we couldn't locate here.
www.thingiverse.com
Enjoy!

Triumph Bobber rear custom lights Kellermann 3in1 by domanrulez
PETG used as mount part with lights and ABS for rear part with logo (u can easily sand and paint it)U need to drill and thread hole to mount main part with lights

Enjoy!