I have a 1937 JD model A with a cracked head. This head has been welded twice on the outside but the machine shop says there is a crack in the mating surface with the block. I have contacted every online vendor that indicates that they have the A587R head. I have actually ordered three from different vendors over the previous six months, only to have each order cancelled due to the head being unavailable. No one seems to have any idea when this or other aftermarket heads will be available. I was hoping that someone on this forum might know where I could get one or who I might contact. Thanks in advance for any information.