Newbie piston/rod question

Hi all,
 
I have just bought some NPR pistons for a 3000gt to fit to another car. The wrist pin has no retaining clips/circlips or any other means of stopping it from scratching the bore. Can anyone advise me on my options?
 
Cheers

Just thought of something to add. I need pin bushing for connecting rod, where is the best place to go?
 
Thanks