Yeah I was quoted around the same price for my EB XR8.
There is a guy in the trading post, around St Clair who sells K&N filters plus other Ford parts such as brake rotors and other things for 90 bucks.
have a look at the trading post web site www.tradingpost.com.au
and do a seach under automotive for K&N and you should be able to find it.
Used to be Mustang1966coupe.
66 Silver Frost Mustang 289 Windsor
71 XY GS Fairmont in Bronze Wine 302 Windsor
92 EB XR8 302 Windsor
Sure do love those Windsors