This situation, as I'm sure you're aware, is very complex --
Where is the anatomical location of the fistulae? Proximal jejunum, more distal?
What is her nutrition like? Can she eat? What does she eat? ---is she being treated like a short gut/High output fistula patient---being given mostly electrolyte solution with limited hypotonic solution and being fed 'constipating' foods such as applesauce, marshmallows, cheese, psyllium fiber, etc?
Is she on any sequestering agents like questran to decrease acidity of effluent or omeprazole to combat hypersecretion? Is she on lactobacillus?
What is her mobility like?
What is her underlying condition and prognosis?
What is her insurance? Without a wound bed, NPWT will not be approved, as fistula management is not a reimbursed indication (though can be helpful in specific situations to isolate a fistula from surrounding tissue). I don't see a wound bed, but do see two see two areas that appear to be EC fistulae.
She appears to have lichenification from chronic exposure to bile acid and likely yeast/possibly superimposed bacterial issues starting.
I would say she needs to be inpatient for a time to have 24 hour care for this with a wound or Ostomy specialist available to get it stabilized so that a more traditional appliance can function.
I would treat this with a wound manager type appliance/eakin pouch combined with a fenestrated red rubber catheter connected to wall suction while working to thicken her effluent and heal the skin.