I have a push in swing tip that I made to fit my Drennan medium feeder rod.
Easy enough to make, I haven't used it for at least 20yrs but it worked fine. All that's needed is a short piece of solid glass. I got mine from an old broken quiver tip.
Same as. Broken Feedertip cut back so it was a bit thicker/stiffer and push the rubber on. Simple. Makes any Feeder rod a Swing Tip rod.