Conversion of MBOX file to PST can easily be done by application named as MBOX to PST Converter. Specially designed to export MBOX files into Outlook PST format and it fully supports inaccessible MBOX format which is made with Thunderbird, Netscape, Power Mail, Apple Mail, Eudora, Entourage and various other email clients from Mozilla family. It is an easy-to-use tool with smart and interactive GUI. It is compatible with MS Outlook 2002, 2003, 2007, 2010, 2013 and 2016.
First you just try the free trial version :
www.convertmbox2pst.com