My bike had some old pedals that had huge gaps and were very noisy. I disassembled them, got the shaft out, and redesigned from scratch the whole body of the pedals. I used one extra 608 bearing at the outer part for more support and allow for the pedal to rotate more smoothly.

Of course this won't fit all the axles, but these are quite generic pedals, so chances are that your bike also bring these shafts.

Let me know if you have any question or doubt. Assembly guide can be found here:

https://youtube.com/shorts/2XDASgBAtyo