Is there any reason why one could not:
1) Find a friend/family member/co-worker with Snow Leopard
2) Log into the App Store with their Apple ID
3) Purchase & Download OS X Lion
4) Copy the installer to a flash drive and install (a clean install) from there
?
The installer may have to be opened and the .dmg extracted, but it's still *legal* since AFAIK you're buying a full license of 10.7 not an 'upgrade', so it'd only be a slight technical hurdle...