You can buy shim stock in many thicknesses. They make sleeves to repair a shaft that got grooved by a lip seal. But you have to turn down the shaft a to fit the inner bore. My 1973 Volvo had provisson on the front shaft seal to mount the lip seal in three different depths at each engine rebuild. so it went in deeper each time to slip over the old grooves.
Bill D

https://www.skf.com/us/products/seal...eve/index.html