@vfrmedia @ieure Behold my Atari 1020 4-colour pen plotter, companion to the Atari 600XL home computer for scale, which apparently uses the Alps mechanism you refer to.
Right now it tries real hard but can only manage to make some noise and make its little barrel dance side to side. If such parts are available perhaps I can get this little buddy choochin' again :blobthinkingcool:
Also a belt for my Atari 1050 floppy drive would be nice too.