AITA for not helping my ex?

My ex recently requested some paperwork on our girls. She has her own copies of this paperwork, but says it is under some boxes in her attic and instead of having to dig it out she wants me to just send her pictures of my copies. The issue is that my copies are also in boxes under a massive amount of stuff in my attic. She needs the copies this week and I told her the soonest I would be able to dig through everything out would be in a few days. My schedule is currently packed with work (there are events happening that will have me working late all week), mandatory work training, plus the kids have events going on all weekend that I am overseeing (think a hundred kids and several hundred adults type sporting event). I ended up saying she may just have to bite the bullet and dig her own papers out. She seemed upset about this. I didn't think this was a big deal, but apparently it is. Some of her friends have made some snide postings on social media about uncooperative coparenting and such. My thought process was she is just as capable of digging through her stuff as I am of digging through mine, plus she has the next few days off work while I am very busy for the next few days.

AITA for not digging through my stuff and finding the papers for her?