Thanks, everyone! I knew I could depend on you all. I love this forum.
There's no tax preparer within a with-kids drive of my house, so if I can manage to get the crew in shoes today, I'll take your advice and try my Office Max. Thanks!
Christina: Thanks for that confirmation. After what we read (and attempted to interpret) on the IRS site, my husband suspected a missing form wouldn't affect me, just her. I guess I've done my part and won't stress too much if I can't get the form today. I'll just send everything to the accountant without.
Jules: IMO, that's the client's problem if she doesn't get the 1096 done also. Call me evil.

I did everything I could think of to get her and her accountant to do it.
Kathy: I've heard the EIN/SSN argument before, and I don't believe it. My understanding is, if the vendor is a sole prop or LLC, 1099s are still required. Only vendors who are taxed separately (i.e., corporations) don't require them. Again--I don't know that for certain, but that's my understanding. I guess I'd just rather know for sure that I've covered the bases. Know what I mean?
You all are priceless. I feel a lot better now. Thanks again!
Now I can turn off my computer and take what was supposed to be my day off for REAL!