refer to the attached image. you want part number 11 for your ex se dashboard.
i bought my part from here:
www.hondapartsdeals.com
even though i have a 2005 civic ex se, i put my vehicle as 2005 civic ex. the part was 40 dollars but i figured it was worth it, so i bought it and it looks great.
the exact honda part number is:
77250-S5A-A11ZC
the trim around the radio you can get from metra. heres the link:
http://www.metraonline.com/products.aspx
the metra part numbers are either 99-7865 or 95-7899
I'm guessing you want your final look to be like this:
minus the peach color.
hope this helps.