Have two cranks now and the one actually in my bike I don't expect to last long so rather than wait for the inevitable I thought it might be good to pull it out and replace what I can. Has anybody sourced bearings, seals and/or little ends separately?

My last crank had a collapsed outer bearing probably due to rust from sitting before I got it, so rather than risk damaging the cases and anything else in the path of the shrapnel it weould be great to just swap these out?

All comments appreciated