As Jon says, the whole foot will be too large, and I'd wonder if a 3D print would be solid/robust enough.
However, if you don't worry about 'authenticity', at least for a while, you might try to do something in two pieces. The base place could be just a flat board, solid wood. The central pillar has a top like an inverted dome, and the dome on the base of the main unit fits into this, allowing a bit of movement front/back at least, not sure about side to side. There is a screw fitting from the underside of the dome on the foot thru to the bottom of the main unit to keep the two pieces attached, but still allowing a little movement front/back. The central pillar might be do-able using 3D, but again I'd wonder if robust enough.
PCWs 'not working, for spare parts' do get listed on ebay from time-to-time, usually quite cheap, but carriage would be a problem. Possible in the UK, but France??
Where are you in France, collection would be better if you could?
Geoff