Synonym for “turn around” in the given context

We don't do stuffy things quite this way in English; our stock pattern is

Whereas [sentence]
And whereas [sentence]
And whereas [sentence]
...
Now therefore [sentence]

But the French prefatories are all objects of vu, and don't suit well with whereas.

The best equivalent for vu I can come up with is in consideration of; but I don't much like repeating that with each justification. An adequately archaic and plonking treatment might be:

IN CONSIDERATION OF
  imprimis, [the provisions of] the Education Code
  item, [the provisions of] Decree 84-573 of July 5, 1984, respecting National Diplomas in Higher
          Education
  item, [the provisions of] Decree 2002-481 of July 5, 1984, respecting University Degrees and
          Titles, and National Diplomas
...
NOW THEREFORE the diploma in __ is conferred upon M.__ for the academic year 2007-2008, &c

I wouldn't say that the word information sounds formal. Though, I agree with you that it is, in some sense, broad in meaning. It's nevertheless a very basic and everyday word just like many other words in English. So, there's really nothing wrong in using it the way you're using it in your sentence. But if you do insist on sounding a little bit more terse and casual, consider substituting the whole thing with find:

Thank you for your find.

Thanks for the find.

Possibly, a word like tidbit would work even better:

Thanks for the tidbit.