I've heard of them but not sure.... There is a company
www.pro-flow.com (248)541-4780 that makes an aftermarket MAF says it's for Zetec motors, not sure if they include the SVT in that or not (i'd bet not, however they might know if they are available).
I tried to call but I just got a whole bunch of ringing! Maybe your Stock one is jacked or you need to reset your system... Unplug the negative battery cable... Let sit 15 minutes or more, Plug back in, start car... It should have the speedo and tach freak out. Then it reset itself and learning over again...
now that I think of it, did you unplug your battery when you installed the CAI? If not then your car taught itself to run best with the stock set up on... you installing a cold air made it get a bunch more air... Kinda like you trying to stick your head out the window at 100MPH. Kinda hard to breathe... However if you live somewhere windy you figure out how to breathe!
Same concept! If you haven't already installed it with the battery disconnected try that. Might just have been your problem!
Good luck