great for you...get brave man!!
I've already looked at the j-sports air-dam and emailed them to see if they ship to the US, etc. I never got a reply from them at all! I was kinda upset about that but decided to buy the ccc fascia and add on and take away what I saw nessesary to model it after the j-sport one. It's a little harder than I thought with out physical measurements but I have good ideas...
Think Auto CAD... these program work extremly well...
Good luck!
If you do get a hold of j-sports let me know