New Pistons and rings

The short story is I need to replace the pistons and rings on my 1970 750 S model. The left cylinder was smoking and it measured out almost 2 thou to big.
Where shoud I start looking for a set of 10 over pistons and rings? Not interested in going the E-bay route if at all possible.

Hi Boz, i am affraid you can't find any +0.10 pistons anymore, only +0.20.......but had measured your cylinder boreabout taper and conicity (and wear), cause maybe that with a new pair of STd piston it could do the trick........few years ago we were used to bore and bore those jugs, and now just try to save iron..........remenber 4 thou to 5 thou is quite acceptable with new pistons..........just my mind. Pierre.