As a follow-up, I pillaged the bearing from my xpedo mtb pedals and all went well. They were perfectly clean inside with the original grease in tact. Now I have to find a local source for the bearings - the official kit is crazy overpriced - especially with the outrageous shipping prices on top.
Thanks!
Some options in this thread…
I got mine from bearingboys - cost me £12 for the set.
That was 4 years ago though 
i got replacement bearing on amazon, they pretty cheap: 6700 and 686. just look at the number on the units and match. read up on “ABEC” ratings but pedals dont spinn that much so not really a factor unless you’re anal and just want the best.
Hello. I have favero bepro. Single side power meter, with look pedal.
I also have shimano spares pd-m520 and pd-m780 (xt series).
I knows I don’t have assioma but bepro, older model, but does anyone know if I can also do the swap? Do inner axles match? Or should I try to disassemble the bepro?
IDK about the Bepro versions, but on the Assioma pedals with pods, only specific Xpedo mtb pedals bodies will fit. I tried some other Xpedo mtb pedals and they did not fit. I’m sure Shimano pedal bodies wouldn’t fit my pedals either.