They sure didn't advertise them much as far as I can tell. I glanced thru a few of the pdf's, they mentioned the front/rear production slides and show the steady rests at least but not a mention of followers. I adapted one for my High Duty last summer... works pretty well. I found the lantern toolpost is a good match for it, the tool can be mounted centrally- easier to reach a tool right underneath the follower arm than with the quickchange post.
I'm happy to see that note about lantern post. Adding tool holding capability or efficiency is worthwhile, to justify purchase or retention. They don't go out of date, or spoil, they may get unpopular. Lot of guys aren't doing work that a little versatility can take in stride, and be profitable.
I've tooled up my Pacemaker "C" 16 inch, with turret posts, Aloris CA's, Dickson pattern ENCO's, and a pair of lanterns. They ALL have something they do a little better, an advantage, over another, the swap only a big wrench and a couple minutes away.
I believe most adamantly that versatile work holding options are worth pursuing as well.