Have u tried to contact TradeSatoshi exchange? As i know listing here is not very expensive comparing to large exchanges - 0.75 btc   (0.8 btc with 7 days promo on the site header)

Maybe it's time to start donation company for listing on new exchanges, TradeSatoshi (or similar small exchanges) would be great to start promoting ITNS later with growing community it will be easier to hit major exchanges.