I did some similar research and found that Chevy Aveo uses a 79mm piston with very short skirts similar to motorcycle pistons. They have an 18mm pin and a 27.10mm pin height. I also found that a Kia Spectra 1.8 T8D connecting rod dimensions are very close, center to center distance was 135.89 I think. This combo would work in an A15, when I checked on Rockauto it was possible to buy a complete piston set and four rods for $428.00