New pistons for Zx7rr

[maxi]

So the time has come where I would like to start racing again on the old girl. My motor is full kit including pistons. The problem is the oil rings I cant get any more and it is using some oil and blowing alittle smoke. Its still making good horse power and the bottom end hasnt done much work. Has anyone got some suggestions as to installing new pistons? Im happy to go with the double compression ring for longevity instead of the kit single ring pistons. Has anyone had experience with Wiseco or JE? Oversize?
Thanks