I got a set like that for home and for the center, from someone here on the board...don't remember who, sorry. I got 2.5 inch, 4 inch and 12 inch for home and a 12 inch for the center. They have removable stems that the bars screw on to. I got stems to fit both my home lathes and the crossbars fit both stems. I like the 12" for the center so my blind students don't fall off the end of the rest, so I am using them on the little jets. Many of my turners are now "hands free" and I only have to help them "hands on occasionally." The longer rests keep them from dropping off the end of the rest when turning something longer than a pen blank. (I do have to put their sandpaper in correct order though.)
Ah, found them Rick Herrell made them for me.
This thread is Closed. But here's the link to my New PDF catalog. https://www.penturners.org/threads/ricks-custom-made-tools-pdf-catalog.180009/
www.penturners.org