As far as the cylinders and pistons go, this is really not much different than any other engine. If the bores can be cleaned up at the first oversize, simply buy pistons in first oversize and have them bore the cylinders. If a cylinder will not clean up at first oversize, they can draw a bead down one side of the sleeve, collapse it, pull it out, pack the replaement sleeve in dry ice and put it in place. Then they top and bore the sleeve to your oversize and fit the pistons.

There are some here that are proponents of sleeving the block back standard and reusing the pistons. Although this is probably the most economical approach, I prefer not to do that because the pistons are very stressed in a diesel. I found one piston when overhauling my 240D that was about to fail at the ring land.

A good machine shop with a good boring bar, one that indexes on the main bearing centerline, like a Rottler, can do a good job with one of these.

My $0.02,