If I was you I'd email Bonnie at Holdens Landing & ask for some of her wipes. They are my all time favourites. She doesn't often have instock but she usually has lots of off cuts left so if you're not fussy about colours she might be able to do it quickly for you under the circumstances. I was really disorganised when I was organising a baby shower last year & emailed her about 2wks before the shower. She made me some up asap & I got them in plenty of time even from the US.
Like pp said, cotton wool is useless with meconium. You'll need the whole bag for one poo!
ETA what about these? http://littlegumnut.co.uk/shop/product. ... product=25 PM Ems & see if she could do some for next week.