Fortitude item?

[EnragedFountain]

So far I've found items with +1 to all skills except fortitude. Are there no items for fortitude or am I just unlucky?

[FT]

I never notice a fortitude item, not even in creative.
I've certainly missed things before though.

[Crater Creator]

There are Fort Bites, named after fortitude. You’re probably looking for something permanent, though.

[FT]

Ooh, good point though if you're just looking for something to temporarily let you craft something at a higher level without spending 3points getting there.
I think this means the Intellect and Perception stats have both a wearable and a drug/drink.

[Chaoslink]

Yeah, fortitude doesn’t have a glasses item like the others do. However, there are more fortitude buffs that anything else with food and fort bites.

[FT]

ShamChowder gives +1 Fortitude for 10minutes.
Grampa's Moonshine gives a +2 Fortitude for 30seconds.
FortBites give +2 Fortitude for 2minutes.

Steroids give +3 Strength for 10minutes.

Recog gives +2 Perception for 30seconds.

[Sir Duckyweather]

It's possible you're playing single player so this might not be of use to you, but...

Outside of items, you can kind of get a semi-permanent +1 boost to Fortitude and Agility if you stick near a friend who has Charismatic Nature. A generous friend with an Intellect build can even boost this to +2, among other benefits. It's a shame that the range doesn't increase at all as you increase the perk level, or at least it doesn't say it does based on its description. Even so, it's something worth noting, situational as it is.