You could just enlarge the one you have at the bottom and flip it the other way... and really this should be in creative outlet...
Try drawing some thing that looks like your own creation...
You have a good Eye and a good hand to copy aswell as you have, but then again tracing paper or gridding could have saved the time and effort...
The nose on yours is better than the smaller image, and I like the Hair on yours more also... your pretty good... but it looks too simular for me to say your creative...
But going on the FACT yours is structurly better than a proffesional image, you need to learn how to colour... Try Berrol Karisma pencils (
http://cgi.ebay.co.uk/Karisma-coloured-pencils-box-of-24-assorted_W0QQitemZ320099872288QQihZ011QQcategoryZ28108QQssPageNameZWDVWQQrdZ1QQcmdZViewItem)
Draw on Ray to Ray copy paper about 50gsm, it has a shinny like surface, and you can blend the colours, it looks like you have used Oils, then go around the outer edge with a fine liner...
You could be a great artist, if you learn to colour...