Sparkling Targe seems the obvious answer to me, given that you have a natural weapon available. Starlit Span also works when using 1-handed range weapons.

That said, you can't generally use items for Spellstrikes, though there is a feat that lets you use scrolls.

The problem is that you don't cast directly, you activate the item, and that activation casts the spell for you.

The flow is spellstrike->cast->attack

An item is Active->cast(from item)

Spellstrike doesn't have the opportunity to activate an item, as that is a separate Action.

Mind, if I was your GM, I would allow it with a Tengu Feather Fan, as other races have innate spells, but not with other items. But you will need to talk with your GM about that.