does anyone have the link for it plz so that I can download it ?

I require the version 1.21

have you looked through this whole SE forum? there's a thread pinned with all the necessary files needed for SE phones including theme creators welcome to M9

read the FAQs

You need to be logged in to download it:

http://developer.sonyericsson.com/site/glo..._multimedia.jsp

"Sony Ericsson Themes Creator 1.31 (2 MB)"

Hope this helps