Dunno if this ever existed but trying an experiment. Don't mind brand but must be well made with tight setback clamp mechanism and thin. Ie 25- 26.4mm size is fine.
I need one with a clamp mechanism that's set back around 20/25mm from vertical. Trying to see if it is easier on my knees prob is can't find any skinny posts with setback, they are all > 26.4. Il shave a post if I have to :facepalm: