I have 4 cylinders from a 1.7. They are 89.xx mm diameter. I forget exact decimals... 0.8 or 0.9, maybe. Not sure the spec, but I assume they would be called 90 mm. I am sure they are stock from a '71.

One has some rust in it, the others are smooth. Are these useful to anyone?

If anyone is interested, I'll add pix. You pay the freight and they are yours.

Clark