Commando Valve Cover Bolt Question

Chrome valve cover bolts. After 60 years become rusted. They where a typical chrysler fastener with a rim on top of the bolt top and built in washer about 7/16” od maybe 1/2” od but all chrome. The washer floats free of the bolt head. Mine don’t look chrome but they are. I found NOS ones at a swap meet years ago. Don’t ask the PN, I don’t remember. Mine is a 66’ Commando.image.jpgimage.jpg