Check out Vanson on the bay...
I likes there Full Dome Knobs rather than the slight dome or flat types. but mine are push on.
Chrome on the P, Black on the J and another set of Chrome for my Rick-o-like.
Nice weight, feel 'n finish... mid price.
https://www.ebay.co.uk/itm/2-x-NEW-Vanson-Domed-Knobs-for-TL-guitar-Push-On-Chrome-Black-or-Gold-VP001-/120883790899?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0
Solid Shaft n Screw - Fannar!
They got a couple of diamiters but listed as 5.9mm Metrick not 1/4" US Fender... drop him a line.