Eldritch Invocation Items

Is it possible for a magic item to grant an eldritch invocation to its wielder? Like, a set of robes that can bestow Armor of Shadows?

DnD Beyond doesn't seem to allow items to gain such a feature from my attempts. Am I just not looking hard enough, or is this a blind spot?

D&D Beyond's homebrew system doesn't have any way for you to make an item that grants an existing Eldritch Invocation as-is.

However, for some invocations it's certainly possible to create an item that provides the invocation's effects without actually granting you the invocation. All Armor of Shadows does is let you cast a specific spell for free, and you can certainly make a homebrew magic item that does that.