Being something of an afficionado of old WB 'toons, having watched them incessantly back in the days before they censored the violence (which was, admittedly, a full two-thirds of the cartoon, which is why The Bugs Bunny and Roadrunner Hour is now The Generic 30-second WB Cartoon Intermission.)
Anyway, as far as I can remember, I never saw an episode wherein Wile E. caught RR. That is, “caught”, to say nothing of kept, cooked and ate. (I’m assuming that’s what you meant.)
He did catch Bugs a couple of times, but he always escaped. In fact, the only exception to the WB 'Toon Heirarchy (Bugs always wins over Daffy or Elmer, Daffy always wins over Elmer, Bugs always wins over Sam, Baby Kangaroo always wins over Sylvester, ad nauseum) is, as far as I can tell, Foghorn and the brown-and-white barnyard dog, who seemed to fairly evenly split winning scores at the end of various episodes.
If such film exists, and it’s authentic, I, too, would be interested in seeing it.
And to slightly hijack the thread, does anyone know where one can purchase “old”, and preferably fully uncensored, original WB 'Toons? I see the occasional Bugs and Daffy tapes, but I was more interested in the classics- the War-era stuff, the obscure ones like Duck Dodgers in the 24th-1/2 Century, and so on.