I forgot you are in Canada. GM canada can tell you everything you need to know about the car. the 1 of 64 might be as a black, 5-speed, t-top, Trans Am, which is rare, especially in 92. There was one locally around 97 or so that the guy jsut couldnt seem to sell- advertised it for 3 years or so - and I know i should've bought it but I did not.
Also on the 1LE part, more Camaro's than Firebirds had it, and if it was on a firebird most of the time it was on a Formula since it didnt have extra weight from the gfx. In 1991 there were 46 formula 1LE and 6 Trans Am 1LE. In 1992 there were 22 formula 1LE and 9 trans am 1LE cars.
Keep us updated, and if its a nice clean car, tell your wife it's rare anyway and buy it