This is either a Skype or Phone call from David Clifford, it may take up to an hour of your time and will most likely require some follow-up Q&A from you via email afterwards to fine tune the design.

A Pintrest board of your inspiration (mood board) images and colours would be useful. Is it based around a game etc etc. 

Buy the end process you will have a DCP Case shield to fit your PC case in the colours and you wanted and with any logos or detail work all designed delivered to you.