Staedtler's Noris Digital Jumbo Stylus has a fabulous feel, better than the EMR stylus from reMarkable, and a fraction of the price, but lacking that magnetic attachment.
This model slips onto the stylus and holds a number of magnets allowing you to snap onto the side of the reMarkable tablet.
You'll need three neodymium disc magnets, 4mm diameter x 2mm thick. These were pressed in with the South Pole facing out nearest the eraser, followed by two North Poles facing out.
Fitting to the stylus was an easy push up the length.
Printing flat, on the magnetic attachment surface, doesn't need support. I recommend rotating this surface away from the bed by 30-45 degrees to strengthen the printed model.
The author marked this model as their own original creation.