You can migrate MBOX to PST file by using the third party MBOX to PST Converter software. You can do complete conversion of MBOX to PST file by using some simple steps. You can convert multiple MBOX files at a time. This tool can also convert the MBOX files into other file formats such as: EML, MSG, DBX, HTML and RTF etc. You can download free trial version and to know more about MBOX to PST Converter software follow ths link:
http://www.datarepairtools.com/mbox-to-pst-converter.html