I buy my eyes from you can go to this site are by them by the thousand we are getting ready to order 10,000 in different colors but mine are flat eyes also you can get them in 3-D also from this company WTP Inc..
the eyes have adhesive so you peel them off and stick them on your plastic body in dipped them in clear plastic doesn't matter whose plastic simple as that. please note if you are doing a lot of bodies with eyes you will go through them pretty fast. click on the link to go to their website.