Holley Progressive Two Barrel Carb.

So, I was talking to my instructor after automotive one day last week about fabricating a kickdown linkage so I can finally get my old Carter 318 BBD on the slant. We got talking about carbs and he told me he had two Holley (can't remember the number, I check tommorrow) progressive carbs for the little Ford 4-bangers. I got to looking at them and they were excellent cores, one even had the electric choke on it! $25 bucks for which ever one I choose. I got to looking though and we both noticed at the same time that they were something else entirely like Autolite or Motorcraft or something like that. He said it was pretty much an exact copy of the Holley... 5048 rings a bell. Again, I got to check on the number. He showed me a picture of it's Holley counterpart and they looked EXACTLY alike. He gave me a cardboard gasket to bring home and check on the Super Six manifold and... It didn't match. But it was close, horribly close. Enough to make me consider some drilling and grinding, which I ended up deciding against. Wageli says he has a couple ways he might could modify the manifold, but I should first check to see if there is an adapter plate out there. So here I am... Does anyone know of an adapter plate out there somewhere to do it? Where do I buy one? If it comes down to it, I jumped on AutoCAD and designed my own adapter plate in drafting today. It's only 1-1/2" tall and I can get a machinist to make it if I find a block of aluminum.

Thanks in advance,
/6 Matt