Received an email back from Steve at Pinball Resource:
"I understand what you are looking for and have been unable to find either stock or the mold.
This type of target stalk was originally made by Wico in Chicago. I have some of them in incorrect colors from old stock we have acquired from old inventory from Wico's closure as well as other distributors closing their doors. Wico's tooling has been, for the most part, lost. They stopped paying their computer bills and the computer vendor pulled the plug on the "map" of where tooling was located for what part....we sometimes stumble across their tooling but there is no organized way to locate something when looking for it.
So...this puts us into fabricating tooling, which is expensive and only warranted when there will be sufficient demand to get a return from what is probably a $5-7,000 expendature....2 different target heads are needed and a bunch of colors have to be made.The heads may be designed into a interchangeable base, but that is for the mold designer and the molder to decide. My experience with this target type does not lead me to believe there is sufficient demand to invest in this tool at this time".
Thought it was nice detailed explanation!