Ok, after a short discussion, we've got 2 options;
1; I use images from manufacturers' websites, with the caveat 'images supplied by client' in my invoice. This absolves me of any worries, as it means I am under the belief that copyright belongs to the client, even though I know it does not in any way. No one will know this. I am covered.
2; Spend time emailing/'phoning suppliers/manufacturers. And invoice for time spent.
Client obviously prefers option 1, and does not in any way think there'll be any comeback. I prefer to err on the side of caution. It's extremely unlikely that Epson etc will be bothered anyway, but best to be on the safe side, I say. Rogerthecat makes a good case for being legally covered...
A few years ago, I got £100 off a magazine, for publishing a picture of mine without my permission. I'd done some photos for a baynd, and their manager sent one to a mag, who then published it. I was aware of what was going on, but my permission had not been asked. I waited until the edition went to press, and then invoiced the magazine. Their argument was that the image had been supplied by someone who they believed to have copyright. I asked for proof of this, that the manager had explicitly stated that he owned the copyright/right to publish, but of course they did not. The manager only had the right to use the image for promotional purposes of their own publications, not any third party. The mag did try saying I would have to seek compo from the manager, but I told them it was they who had published the pic, not he. He had merely supplied them with an image, but given no expressed permission to use it.
Of course, had I spoken out sooner, and told the mag, that the image was mine, and I wanted paying for it's use, they probbly wooduv not bothered with it, or I'd have only go £20 or something. So, a bit sly of me, but that's how the system works; screw or be screwed, unfortunately. Immoral? Go talk to some MPs... 
It's all about the wording. If the client informs me they have the rights to reproduce an image, and this is expressed in a contract, then my arse is draped in silk and velvet. If not, then it's open to the elements of Law.
Ta for advice. S'a plaver though, in't it?
