K&N makes a small 7-inch filter for racing applications. I have a pair of them on the two Holley 6224s on my car. It's the only one I've found which will fit up inside the hood scoop cutout on the ERA hood if you have the two 4-barrel setup, but should work for your application also. Filter is K&N model number E-3402. Here's a link:
http://208.196.170.231/cgi-bin/univ.pl
I had to special order them through the local Loper's speed shop in Mesa.
If the 7-inch ones are too small, and you have the dimensions of the filter you need, you can go to the K&N site using this link:
http://knfilters.com/universal/univsearchin.htm
Enter the size and shape you need and it will tell you if they have any filter to match. Keep in mind that the K&Ns are designed for long life; you clean and re-
oil them rather than replacing them. As such, they're expensive; the two little 7-inch ones I bought were about $32 apiece.