One of the original bar ends had sheared off, so I've been trying to get the plastic/metal remnants out. What have I got myself into? Anyone else been in this situation?
Tackle it from the other end with a length of steel bar or similar Gently tapping with a hammer. You might need to replace the plastic stop end as I did as it was brittle and a bugger to get out.
Do as above and order new ones from Protwins, they sell them on Ebay. Not identical but they are a Ducati part and clip into the handle bar.