Yo, 
     I'm currently running a 96' XTZ 66O Tenere and during a brake overhaul managed to snap off the rear brake calipur bleed nipple (don't even go there, It's back enough that I did it!!) 
I'm currently searching for a second hand replacement as my attempts to drill/ release/free and remove the remaining stub didn't work and have consequently screwed the calipur and left me with no options but to find a replacement. 
 
Can anyone help/point me towards a decent second-hand replacement and thus get the tired and cantankerous old dog (the bike, not me) back on the highway? 
 
Regards,  
 
The archaeologist.