Hi,
Your project sounds very interesting and I'd really love to work on it.
I have over 15 years of experience as Physics and Math teacher, but I've also done a lot of both Excel and MS Word work (Macros, Templates, complex formulas), some web scraping using my software, desktop applications, web browser extensions, some Access and VBA work, etc. In my portfolio you can find some screenshots of application that I made for my school-related needs.
I already have experience with recovering a hard drive of my own and the software that did the recovery recognized the extensions of each file. If that is the case with your files that would make this project much easier, in any case I am almost certain I could successfully preform this task, but I would nonetheless like to see examples of files in question, just to be 100% sure.
Should you have any questions about me, my work or my experience, I'll be happy to answer. In the meantime, see my reviews and kindly consider my proposal.
Kindest regards.
Milan