Wow for business cards? Knowing you, its not like you were walking around handing them out, you were just giving them to people you met and chatted with.
I wonder what parameters are acceptable. A tee shirt with IP&T is acceptable but not if it has a coupon code on back?
Michael, I am as uncomfortable doing shady-like business as you are but I genuinely suggest that you contact Subifest to get an email saying its okay to deliver a few parts. Do not mention that the fiscal transaction will be going on as well. As far as they are concerned the parts are paid for. If they do not bite, either do business off campus (sucks) or on the down low. I am sure there will a few GLARING rule breakers that will keep the heat off you.
At any rate, they should be doing backflips that you would be so respectful of their event as to check with them.