The main blog (needleprint.com) had a post earlier this week stating this:
The Mary Wigham Downloads went through the roof on Monday!
The number of downloads on Monday more than doubled from our expectations! So at the moment I am out of bandwith which is not a problem - but I am away from home and don't have the files here to upload to my secondary website. It looks like someone is telling me to stop working on my holiday here for a few days. I can keep posting, but downloads are not possible until I get home in a few days. Thank you for your patience.
I hope this helps those of you trying to get part 4 & are not able to.
We just have to be patient!!