I have a nice pair of Thickstun-type head covers for 59A heads. I am told these are repops from the 1960's or 70's, but I don't know for sure when these were made. I made a pair of brackets which fasten to two head bolts, and the head covers are held to those by acorn nuts. Buyer pays shipping from 72703, or pick them up in NW Arkansas. Contact me at 479-790-4229 or waterwalk999@gmail.com. Thanks, Mike.