Sorry for the blurry pics here, but I made this tool up the other night while working on a new Challenger .15 wing. I prefer to leave the laser cut "plugs" in the ribs until the wing is framed up so removing them afterward can be a little tricky.
After a little head scratching I took a scrap piece of dowel and razor sawed an angle into it about 3/4 of the way through at roughly a 45 degree angle. Then I took a brand new #11 blade and CA'd it firmly into the slot.
One note, this can be considered a right or left hand tool. When you get ready to glue the blade in pay attention to the direction it faces in relation to the handle.
There you go, a custom Rib Plug Remover Tool Thingamajig...