I'm looking for first prints of the standard HarperCollins hardback editions of Silmarillion and Unfinished Tales. While new copies are easy enough to find, I haven't had much luck identifying first prints. Does anyone here have copies they may be willing to sell?

http://www.tolkienbooks.net/php/details2.php?id=760
http://www.tolkienbooks.net/php/details2.php?id=832

Update: It doesn't need to be a 1st impression. I'm just looking for a L.E.G.O. print.