Hi, I fined some free good Hi-Res textures maps, of Earth, Moon, Mars, Venus..... 
Maybe someone know this, maybe not.... 

free maps, with res: 2500x1250
http://www.oera.net/How2/TextureMaps.htm

some another link, with res 2048X1024
http://www.orbithangar.com/searchauth.php?search=markl316
*some maps can be with higher resulution (if I don't find them on another web. I don't remember :) )