Man! Paul! I'd say you got your money's worth from those spokes and it is indeed time for new.
Good on you for the roadside repair; well done!
Next time something like this happens, you can use a little trick to prevent loss of the nipple:
• When you go to remove the old nipple, make sure it is pointing "down" as you unscrew it. This way, the nipple will fall on the floor/ground (perhaps never to be seen again) saving you from the terrible sound of it rattling inside the rim.
• Then, when you go to thread the new nipple on the old spoke, first screw the old spoke into the top (mushroomed) end of the nipple a few turns. The old spoke will serve as a handle to keep the nipple from getting lost inside the rim till it gets started on the new spoke.
Works like a charm and saves lots of time and aggravation.
All the best,
Dan.