I have a full set (i.e. 6 X 901 103 901 01) of 67-68 S Mahle piston
rings. These are pretty much unobtainium, Pelican Parts lists them
but can't supply them, nobody else seems to have any either.

If you're planning a 67-68S rebuild or any 2.0 rebuild using S pistons
with 1.5, 1.5, 4mm rings you'll need a set of these.

$250. Shipping from Australia will probably be about $15 to USA/Europe.

andy