Hey! I've uploaded the 1600x900px version, the link is on the description. It looks a bit different from the original one because I lost the original .psd file lol, sorry about that. And sorry I took so long to reply you.
I'm a big fan of TBBT also, therefore I like this wallpaper you made. Although, the author of original picture made some illogical mistakes: 1. Penny is sitting at Sheldon's spot 2. Nobody is sitting on sofa 3. Couch is more impressed by Penny then anyone else which makes her look fat. 4. Leonard's pose is weird :S