Who sells door liners for a 1954 Model M-105-D IH refridgerador?

I still own and use an International Harvester, MODEL NUMBER "M-105-D," SERIAL NUMBER "2000" and MANFACTURING IS "5-15-54." The door liner has begun to crack and allow air to escape and heat to enter. That is not good for the fridge. Where can I find a new liner or sealer that lies between the door and the main body of the fridge? Or will most any fridge liner do? Thanks.