Yes there is, trade your PS3 slim 120, for a first gen PS3 80, then spend 120+ dollars on the 2008 Vana Diel collection for ps2 lol. No unfortunately SE and Sony dropped the ball on that one. My little brother actually owns a ps3 80 gig that's backwards compatible, and he searched for about 3 months straight to find a decently priced PS2 version, and the best he found was 80. bucks on ebay, that was about 8 months ago. This is what I found on ebay a little bit ago, but I POSITIVE the reserve is at least 90 on this... : http://cgi.ebay.com/Final-Fantasy-XI-11-All-Expansions-PS2-Mint-/170532871957?pt=LH_DefaultDomain_0&hash=item27b48d1f15
Sorry for the bad news and good luck !!