It's difficult to be sure how to approach this without inspecting the damage and measuring it, but if the three paper insulators you have are standard Lucas items it means the hole is at least 0.030-0.040" larger than the OD of the bearing. This means that with one standard 0.010" paper insulator you would have an excess clearance of at least 0.020-0.030".
I'm jet lagged and not near my data, but let's say the OD of your bearing is 35mm. Given that diameter, machining a thin-walled shim of the required wall thickness from brass would be pretty easy. Again, assuming close inspection turned up no other issues, the general procedure would be to start with a larger dia. brass rod (e.g. 1.5") and bore a hole in it of the proper diameter (i.e. the OD of bearing +0.010"). Then turn the OD down to whatever the current ID is of the worn housing (plus ~0.001"), part it to the required length, and press it into the housing.
It's likely the hole in the housing is oval so carefully centering it and taking a few thou. off to make it round again would be done before making the shim to size to fit the hole.