Just in case you give up on the plastic eyes, I use Jean Greenhowe's method of making eyes for knitted toys. Cut a piece of black yarn about 8 inches and just as you would make a knot, instead of a singe wrapping of the yarn, wrap the yarn several times then draw the knot up, trying to keep it as round as possible. Using a long tapestry needle, insert 1 end 1 stitch above and the other end 1 stitch below where the eye would go. Pull through the stuffing 1 yarn end at a time. Repeat for the other eye. If you had stuffed only the head, then you could tie the ends through the stuffing, indenting the eyes a little in the process. When you have the eyes just the way you want them, knot the ends the pull the extra thread through some point in the doll and snip the ends. If you've pulled hard enough, the thread end should disappear into the body. You can experiment with different yarn weights for affect. Hope this helps.