A rip's a rip. It's still a company's work, no matter how much effort is put into ripping it.
If someone was going to credit you for it, they will. Those that won't wouldn't listen to that the sheet says anyway.
Thats just how it is.
If you submit a sheet to a site other than Sprites INC, I say at least put up "ripped by *YOURNAMEHERE*"
Don't demand credit, people are more likely than not, not going to. How-ever, take solace in the fact - there are people out there whom do.