https://wheelsmfg.com/products/hub-p...cones.html?p=2 is another place to start if no coop or old established
LBS is not available. Looks like many are out of stock but the profiles and measurements should be helpful.
FWIW, for casual riding, a bit of grittiness in a hub is of little real consequence. And as noted, sometimes it is
cheaper just to replace a wheel if a secondary or tertiary market for such exists in your area. Older wheels are
sometimes quite nominally priced or free. Just check the rim carefully for damage or humps/wobbles when spun.