Howdy again; I recently tore apart a nice Tiagra 12 reel, and pulled the spool bearings to clean and relube, and noticed it had a spool spacer between the bearings. below is the Item , it seemed to be custom made. So I copied the dimensions for others to use as a reference if needed.
(http://i1344.photobucket.com/albums/p660/gst6814/IMG_3891_zpsdllwscw5.jpg) (http://s1344.photobucket.com/user/gst6814/media/IMG_3891_zpsdllwscw5.jpg.html)
(http://i1344.photobucket.com/albums/p660/gst6814/IMG_3894_zpsganbpbiw.jpg) (http://s1344.photobucket.com/user/gst6814/media/IMG_3894_zpsganbpbiw.jpg.html)
(http://i1344.photobucket.com/albums/p660/gst6814/IMG_3893_zpsiwhlvnii.jpg) (http://s1344.photobucket.com/user/gst6814/media/IMG_3893_zpsiwhlvnii.jpg.html)
This might help someone, someday, somehow, maybe, cheers.