Are we setting ourselves up for biological ambush?

I may be taking this too literally, but no, the likelihood of using a sterilized gauze bandage for delivering a biological agent is virtually nil. First and foremost is the lack of predictability in when and to what extent the outbreak might emerge since you first have to inflict a wound - but not a mortal wound that kills the target - for which the bandage is used. Which raises the issue of the sterile bandage as the delivery mechanism - why target military forces who are likely the best prepared to deal with this sort of attack? Additionally, the challenge of keeping an organism viable (even spores like anthrax, though they are admittedly easier) in what must appear to be sterile packaging may well be insurmountable. Couple that with the incubation period of a typical organism before debilitating illness occurs, difficulties in assessing/predicting communicability of secondary infections, etc., and you're talking an enormous amount of uncertainty for the attacker to know when/how to exploit whatever effect they achieve. Certainly it would have a terror value, but as a military weapon (since we're targeting military forces), it is enormously inefficient/ineffective.

Now, if you want to talk cyber and the potential vulnerabilities of using components sourced internationally....

I can speak a little on this. I've referred to myself a s "former gun dealer" but we did so much more than that. We sold guns, equipment, and clothing to local, state, and federal governments.

There are a couple Laws that are very relevant:

http://en.wikipedia.org/wiki/Buy_American_Act
http://en.wikipedia.org/wiki/Berry_Amendment