Let’s call them window sliders

my thought exactly. i'm not a tech savy guy but i;ve seen enough about those 3D printers to know it would be a easy task to copy the originals and print them were not talking rocket science[maybe we are].the ones they are selling have those little plastic tits on them like a injection molded piece there would be the problem there mold is wrong. but that doesn't seem to keep them from selling them for 125 dollars

If one of you guys could post a decent drawing with all of the dimensions I could make a 3D model in SolidWorks which you should be able to then give to anyone with a 3D printer. We have a printer at work but it's not really for personal projects.