Congrats again on the new Mach1!
Goodies for the Mach1 are fun to get . . .
places to get them are abundant.
Stangnets "partshopper.com" is one place to start.
Mustang Racing Technologies is good too
http://mustangracing.com/ Scott Hoag who left Ford is the man there and he was the Director of Engineering for the Mach1's design and production.
Steeda has a lot of Mach1 stuff too.
Pick up a Muscle Mustang and Fast Ford or 5.0 magazine and you'll find lots of ads for places to get "goodies" for your Mach.
One thing about the Mach1, with the exception of the Engine, most of the aftermarket GT items will work for the Mach too.
Edit for reply about the tuners: The Tuners allow you change certain perameters on your Mach such as, turn off the Traction Control, adjust fan on/off settings, adjust speedo for gear changes, add or remove igintion timing and A/F ratio, change rev limiter, turn off 02's, turn off speed limiter plus more and if you have an automatic you can tweek shift points and firmness too. Both also add a little more for performance and although the Predator was here first the new SCT seems to be the wave. For a simple drop in tune if you have a 5-speed either is about the same but if you have an automatic then the SCT has some extras that the Predator doesn't.