I did notice that Advance Auto is starting to carry stuff for the import crowd. They´ve got a pretty nice selection of cone filters -in nice colors too! - that would fit on the GT. You´d still have to get the adapter plate though, or fabricate your own. Shouldn´t be too difficult, especially if you have access to machining tools. Then you could control the flare and taper of the adapter inlet to perfectly match the VAF (or whatever it´s called).
I don´t know about the flow rate however. The cone filters they carry are pretty to look at, but would advise you to do some comparison shopping to make sure they flow enough air to be worth it.
Agree with you on the price issue. Granted I bought my intake used and from a friend. All it was was the filter and adapter. It´s a K&N setup purchased from Rod Millen Motorsports when they did Escorts. Think the price was around $180new, and that´s ridiculous. I got it for $50 which I was happy to pay since it was my first aftermarket piece.