Parsing GHC Core

Hi, I would like to parse GHC Core to an abstract syntax tree, as the old GHC Core library used to allow the user to do. I do not want to depend on the GHC API (too big), but don't mind depending on a small and separately available .cabal'd package. I also don't mind copying a few modules into my program. The types are of no interest to me, if that makes it any easier Does anyone have the code/library to do this sitting around? Thanks Neil