Hello there!
I'm quite interested in helping you with compositing work, in fact I would be happy to do so.
I have been working with compositing for over 6 years now with professional software, and can finish 3 and a half minutes in no time.
I only have one question. You said in the description, that I only need to match colours, but do I have to also matchmove? If there's tracking involved, that's absolutely no problem, just maybe add a day to the time in I can finish your project.
I can offer you unlimited revisions as well.
Kind regards!