This one isn't threaded either. It doesn't have a sleeve though. The post is simply an extension of the same piece as the bead.
One of the options at Brownells looks like it would work, but not sure they still have them available. They have 2 sizes listed and one says it's out of stock but the other says it's no longer available. I kind of get the feeling that neither is available. But I'll keep an eye on their website just in case.
The one at Brownells has a threaded shaft, but they state that it's "undersized" and should be installed using an epoxy.
