Victor hasn't said where he's at... I get the feeling he's across the pond.

So bay of fleas finds aren't gonna do him no good.

Id sure like to know just exactly what broke the cam chain.. as for there being a 1/2 link in it, that bothers me,, this isnt the compound on a drilling rig,,These chains arent built with splitting & adding a 1/2 link in mind.

A chain runnin & rubbing is gonna make some stuff in the oil. Its gonna get in the sump,, I cant see it as anything but an engine killer,, You mite have gotten lucky enough that it didnt splash into the bottom end bearings & maybe the filter caught it all & maybe none of it is hung up in oil passages,, but Id be way concerned with the idea of putting $$$ in that engine,
Was the rubbing on the side toward the piston or toward the outside?

Yep,, Youve got a nice little something to take apart. I dunno what the cost of gaskets would be, but that engine isnt high mileage. The condition of bottom end bearings would be a concern for me, but, IF you take it apart carefully with POssibly putting it back together in mind, you just mite save it, but then, I have no idea what the cost of puting it back together would be, so, I guess if ya knew that goin in, youd have an idea about whether or not you need to be careful taking it apart,,
I think pulling the stator takes a special tool, but, if the engine is junk, the time to get in just for the fun of doin it may not be a good investment,, unless you can beg or borrow any tools.