The "VAR 188" is the correct tool.
Maybe check with Sheldon Brown for this odd piece. I see he still has it listed among his offerings of odd French parts - (just below the photo of the Cyclo freewheel). But, I don't see it listed on the page among his other freewheel extractors so maybe he's now out of them.
Bob Hanson, Albuquerque, New Mexico, USA