Quoted from bronco-jon:
It's a freaking nail for Christ's sake. I seriously doubt Jennings had those made just for their machines.
...then again, maybe they did. it just looks like something that wouldn't be hard to come up with.
Snapped a 8-32 top 8-32 bottom post on my breakshot this week. Uses a 1/16th post sleeve, should be easy to replace right? Nope, not at all. You can use something similar, make something, or repair the original.
So, feel your pain. I think this weekend I am going to drill out the bottom of the post, tap it, put a new threaded rod in, all to fix something that should be common and easy to get.