In case you missed it over in the comments, Alistair has come up with some cracking advice on how to get hold of logos in EPS format when you're dealing with clients who don't know their epss from their jpegs. Here's the tip:
"I've lost count of the number of times I've struggled in vain to get the right format of logo from a client. Particularly if it's a third party's logo. And as with Richard, when they do come across, it's nearly always as a lo-res web based .jpg. But, I've found that you can nearly always find what you're looking for by doing a Google search for .pdf files, either with the company's name in, or by confining your search to their site. Both searches are easy to do via Google's Advanced Search. Then you can open the relevant page (the page featuring the logo) of the .pdf in Illustrator. The original logo embedded in the .pdf is nearly always an Illustrator vector logo, perfect for use. Just grab it and you're away. It's laborious and more effort than it should be, but it beats going backwards and forwards for weeks."
I've tried it - and, yes, it works a treat.
Thanks very much for sharing that with us, Alistair.