In my previous post I mentioned the V&A exhibition. Of course I'm very stupid as assumed it would have finished by now. Was there earlier today and the exhibition is on till April 2013. If you are in London before then Batwister, worth going to, and while there, head upstairs to the Print Room to see the rest of the prints. The National Art Library is also in the V&A and they have most publications by Moore and those featuring him which you can get access too though can take up to two hours to get them. Searchable index here; http://catalogue.nal.vam.ac.uk/ipac20/ipac.jsp?profile
However, best to check Print Room and NAL opening times before going. Library does need a reader's ticket but should be OK to get a day pass with ID.