I use the polished BBK STB with a 95 Cobra intake (+ spacer between upper and lower). For me, it makes a huge difference (being a vert) in curvy roads.
Ford Racing Sells one for around $110-$120 from Summit. It works with Cobra and fabricated GT40 uppers. I put one on my cobra and it uses the stock mounts. I had to elongate one of the holes with a grinder, but that was the only trouble I had. I would also suggest hitting your local hardware store to get some stainless bolts/washers. The ones they include are crappy.
If you're on a tight budget like me, this is a great deal!
Mr. Clean, I have a Steeda STB that came of my Cobra for sell. It's black powdercoated and in excellent condition and comes with the bolts. I now use the Cobra R STB to clear my TB and intake because of the 3/8" spacer. PM me with an offer if interested. FYI. I will be out of town on Weds 6/28.