OK, this thread is not meant to step on any vendor's toes, it is simply to get a good list for where to buy Mitsu parts/services online.
I will start with a few that I know of, and everyone can add their own. I will keep an updated list on the first post. These are just a few off the top of my head to get the list started.
Please remember that in a lot of cases the site sponsors are setup as dealers for these other shops.
Site Sponsors:
http://dbptuning.com/
http://www.maperformance.com/
http://www.primoperformance.com/ (unfinished website? Jesse?)
Other:
http://speed-source.net/
http://www.machv.com/
http://www.kigglyracing.com/parts/
www.forcedperformance.net/
http://www.magnusmotorsports.com/
http://www.dsmparts.com/customer/
www.roadraceengineering.com/
www.perrinperformance.com
www.cobbtuning.com
www.extremeturbosystems.com
www.gscmotorsports.com
www.cbrdspeedfactory.com
www.evomoto.com/
www.dejonpowerhouse.com/
www.partsdinosaur.com
www.turbotrix.com/
www.thedsmgraveyard.com/
Transmission:
http://www.sheptrans.com/index.htm
http://www.jackstransmissions.com/
http://www.teamrip.com/
Admin, you can edit the list at your discretion.
Everyone else, feel free to add to the list!
EDIT: These will not be separated by DSM,3/S, or Evo anymore. Most of the sites listed cover 2 of the 3 anyways.