The idea would be to have a bauble that has the same passive effect that the pumpkin: allow player to look at endermens' eyes without provoking them. And also limiting vision (like the regular pumpkin does).
Since it's a quite powerful effect (because it leaves open your vanilla head slot for your diamond overpowered helmet, that's the whole point of the trinket), I guess the recipe should be relatively expensive.
Maybe with Eye(s) of Ender (not Ender Pearl), the glowing ingots and, of course, a pumpkin. Or even a previous stone as prerequisite (like the polarized one, since this also deals with avoiding enemies)

Hmm, Interesting Idea, I'll play around with it, If it works out, I might add it

I've been working on this but it requires a lot more work then I thought it would, I'll add this to my Todo list.
But unfortunately it will not be in the next update, I'll continue to work on it though.

Oh, Good news, got it working ahead of time, should be added in the next update