My only reason now to switching to Lion is Xcode 4.1.1 I can't download an older one, not available, does anybody know where to get it?

I am currently running 10.6.8 with a looped .mp4 (not bad, got used to it and just because im running GTS 450... the 460 is same deal)

Would love to have Lion, even bought an upgrade voucher but it won't let me register it, it has to be done through Apple App Store..!