The steam isn't a good thing.
Cam and lifters usually don't go bad unless one of the rollers seizes. Alot of big reman co. like AER reuse lifters and cams on roller engines like the PSD.
I can get a pretty good deal on parts from the machine shop I used to work for, ask Tubbz about the lifters I just got for him.
As for sleeving the one hole, I've done it, but didn't like doing it. The press fit on the sleeved hole eggshapes the cylinder next to it. A hone that has diamond stones can fix that skippy but it has to be diamonds. Vetrified stones would take too long to get it round ending up with a slightly larger hole. Also the block would need to be decked to do it right.
Mahle makes a +.010 size too but may be a little harder to find. Diamond stones would be needed to hone it +.010 since you can't bore that small of an amount.
Don't forget you'd need cam bearings too if you bored it and such. The crank would prolly be fine, maybe a slight polish job. I can look into a rebuild kit if you like. Let me know.