Emergency essentials has a lot of per piece medical stuff for FAKs - I believe they have iodine wipes as well as other types of antisceptic wipes.  They have a wide variety  of single use first aid items.
 Emergency Essentials Gerber bags fit in all my kits.  Another possibility are the MRE hot beverage bags, though those are a bit bigger and I doubt if the seal is as good as on the breast milk bags.   
 
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"2+2=4 is not life, but the beginning of death."   Dostoyevsky 
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