Outside the box or am I off the wall, Lol.
If this area in not high stress or pressure maybe something such as this?
Green = Block
Red = Plug
Black = Spring Steel Shim (.003", .005"?) rolled to fit in bore
Silver = Old Bearing Shell
Blue = Epoxy Filler? JB Weld?
This is likely the direction I will go. Thin wall sleeve, epoxy and a clean up, and a hone if I decide to use my ARP main bolts. Gotta stop the sleeve somehow, can't have it blocking the bore out to the filter.