I found a nice set of gt take offs from craigslist for 200 bucks. They were taken off from the dealer for a roush conversion, so they were basically flawless. I'm not sure the exact specifications, nor the difference between 17" gt rims, and the machs, but they don't seem to rob any or much performance.
I searched craigslist to find that deal for a month. For $150 and with tires, you can't beat that. Shoot, even if don't end up putting them on, you could resell them for at least that or me.
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2000 V6
A.M. CAI
Dual exhaust w/Flowmaster super 44's.
GoodYear F1 tires
17" five spoke GT rims
Painted calipers, Painted pony, flat black painted hood stripe, flat black painted spoiler.