Can anyone recommend any sites apart from blurb that can offer a one off printing service for a magazine?
lulu.com or others - there's plenty out there.
What's the issue with using Blurb?
Are you using local printers regularly? Often, if you're using printers regularly they can do you a favour with a 1 off print of something, they usually just put it in with a small print job of similar size and finishing.