The "Teflon" strips could possibly be sold under another name since "Teflon" is a registered trademark for PTFE (polytetrafluoroethylene). One source might be an art and crafts supply store. Some of the art/craft sheets or boards they sell look and feel like PTFE. Someone here will have a better idea. Many Dobsonian telescopes rotate horizontally on Teflon strips stapled or glued to the turntable base.
PS. A few weeks ago, I found the exact material I needed for a project (unrelated to telescopes) when going through my garbage. Turned out that a discarded plastic food container's material had just the right thickness and could be cut easily It came from a Chinese food take-out place.
Edited by Ulmer Spatz, 02 March 2021 - 12:47 PM.