I would run a top end bearing, INA SKF NSK, rubber sealed, you should be looking to have the old grease removed and a tough good quality water proof grease installed.
You also have to be careful with fitting, use the old bearings to practice with before fitting the new ones.
If you decide to tap the new bearings in, place the old bearing on top of the new one and tap that, if any damage occurs it will be to the old bearing.
Fitting bearings isn’t all that hard, but there is always the possibility that you will damage them during installation. Which means they will not last anywhere near as long.
Once the bearings are fitted, check to make sure they are seated properly by rotating them, manually or by turning the axle.
If you want a hand, just give me a shout, or you can listen to SV and end up! not having a clue 😯 but believing otherwise 😉