I have a used 457122 that I would be willing to let go of for $80 shipped with PayPal F&F or $83 for goods & services. When I got it, the knob was in bad shape so I made a new one. They are right around 334g with my alloy & powder coat. I can't remember the as cast diameter, but I did size them down to .458 after PC. I'm using 50/50 clip on & stick on wheel weights.