replace piston with another

Hello everyone, I tell my question a few months ago I broke my car is a VW Passst 1.9 TDI. I have to replace the pistons or get one used, what happens is that I do not get new or one used, it seems that two different engines seem to be made and the one that I have is just the least there is for that reason there are no spare parts. What actually changes is the height of the first compression ring, mine has it from the piston's head to the first ring, it has 13mm, my query is to put 4 pistons of the model that if the only one has to change is the height of the hoop in you

Look good the unique real way of knowing is to try but, there are things to take into account the piston comes very top that is to say it goes from the line of the blocke or arrives fair, because if you do not get to pass the ring to catch that it is very Serca of the line of the block according to I would not be so important, but in reality I would ask for more opinions to be sure, what I sched type of pistons and are not affected, but they are career cars in normal operation.

As Kikemec says, it could be proven, but it would have to be seen because it is different, if it corresponds to another motor power (even if it seems it) because the material can be different and dilate or more or less, with which I would no longer adjust the same or could endure the same pressures in the head the piston, but then the "step" is that although sometimes it is sometimes not appreciated in the upper part of the cylinder As I worked before and it is not convenient ... This of exchanging pieces is sometimes not so simple and I personally did not "play" and continue looking for some patience until those you are looking for, if you want to do it with a guarantee of more success in the repair. Greetings!!

Hello Fabricio2786.
To the contributions of Ismael and Kikemec I want to add something:
generally in naval machinery are engines several years ago, I have continually touched to make adaptations of various types due to the difficulty of the spare and pistons are one of the most usual. Those who arrived are from the same house and for a couple that you have, that means that you will not have material problems, verify the weight, the distance from the bolt to the crown must be equal to the original and the skirt that is not longer, if you have that I think you will not have problems,
luck.
Miguel