Yes, I realize this is an old thread, but someone searching for Dorman lug nuts may happen upon it.
3D Printed Dorman closed-end shells/caps are available for Dorman lug nuts 611-109 and 611-224 at https://www.ebay.com/itm/167182545561
Designed to reduce the chance of rust in states and municipalities where road salts are used in the winter.