your local nissan dealer should be able to find them for you. the numbers from nissan fast for the parts are
1. set puiston ring 12033
2. connectiong rod bearing 12111
these are not complete numbers but will help your dealer find them for you. get into a good relationship with your nissan dealer as you will be visiting him alot. good luck mate...if he doesnt help pm me and i will see if my guy can as hes very helpful.