To migrate the MBOX file to PST, I recommend you to use A2Z Migrations for Thunderbird to Outlook. Using these two in one solution, you can easily transfer the Thunderbird profile or MBOX file data to Outlook PST and you can also transfer into MSG, EML, HTML, MHTML, and RTF, etc formats within a few easy clicks.
More Info- http://www.a2zmigrations.com/thunderbird-to-outlook-converter/