Visited a small fabrication shop that we use for business, and they on occasion make kit car chassis for a local Jag based replica. One of the fabricators, who is highly skilled, also makes parts for restoring race cars.
Anyway was discussing our wishbone issue, and he laughted at replacing a complete wishbone for a cracked one. Apparently cutting out the crack to a V, rewelding, then wrapping a piece of aluminium over and welding in place is the way to go. He then pulled from beneath his work bench a pair of wishbones from a race car that where freshly fabricated, and wrapped as a matter of course for strength. These were stainless steel ones.
Also splitting wishbones due to bush sleeve corrosion he had seen before.
I know this method of repair has been discussed before, and having now seen this wrapping method applied to a new wishbone for strength on a race car, I would seriously consider this repair myself on my car if I had a crack.
Problem of course today is the liability issue of the repair. Doing this for a race car is not the same as a road vehicle. Sigh.