Hello Mike,
I don't know the answer directly other than suggesting you look at the bearing suppliers websites to see what they offer.
I am though of the opinion that oilite bushes will be more rugged for the duty long term and they should be a simple press out/press in replacement. Remember to soak new bushes in oil for 24 hours beforehand to get the pores really well loaded.
Extraction and replacement is probably best done quietly and steadily with bolts to draw the old bearing shells out and then pull in the new bushes. You may need to make some stepped fittings beforehand to help with that
Kind regards
Brian. .