I would either find "tic-tac" sized newborns somewhere, or cut the ones you have. Make SURE it is SMALL!. maybe 1/2 of a regular sized one, or just the head, whatever seems to be appropriately very small.
The eye-cap you mentioned, if left on could possibly cause huge problems too. It can lead to bacteria/fungus build-up underneath the ocular lens. I've seen snakes before with nasty absesses from this, so put the snake in a small container(don't forget air holes.LOL!) with some very moist spagnum moss, or many pieces of wet sponge, etc...leave the snake in this overnight, and it should easily come off. Do those few things mentioned, and hopefully the snake will do fine, Don't forget to let the small snake have an environment around 80-83 so it can properly digest the meal, this is crutial.
Good luck with it, and let us know how things go!
~Doug
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"Better to be silent and thought a fool, than to open mouth and remove any doubt!"