i had the same problem with my 1929 Pontiac 6-29. i was not able to find a puller. What i ended up doing, remove the tire, by removing the bolts, slide it off, then using a piece of wood behind (inside frame side) the rim and 2 small bottle jacks Frame ->bottlejack-->Rim. Then adjusting both equally, i was able to get the Wood spoke rim off. turns out my key was pushed all the way in.
hope it helps.