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.

Two shorthand notes that are used in scholarly writing could come in useful here:

1. cf.

The abbreviation cf. derives from the Latin verb conferre, to bring together (from which confer is the conjugation of the imperative form), while in English it is commonly read as "compare". The abbreviation advises readers to consult other material, usually for the purpose of drawing a contrast.

2. Viz.

The abbreviation viz. (or viz without a full stop), short for the Latin videlicet, is used as a synonym for "namely", "that is to say", "to wit", or "as follows". It is typically used to introduce examples or further details to illustrate a point.