Sourcing new pistons and liners

[galfredus]

Hello all,
My 1929 AC six engine is now reduced to its component parts. All is good so far, apart from the pistons and liners, which are really too old and worn to be worth re-installing.  I would be grateful for any advice fellow members have on the best sources for pistons and liners, and what compression ratio I should be aiming for in the former.

Thanks!

Geoffrey