Hi,
I couldn't find the exact version you wanted, but here are links to some other older versions of Mp3Doctor.
Vers. 5.0.2
ftp://ftp.sogang.ac.kr/.4/win95/sounds/mp3doctor.zip
http://dl.winsite.com/files/619/ar2/.../mp3doctor.zip
Vers. 5.1.3.1014b
ftp://ftp.freenet.de/pub/.disk0/ftp....torinstall.zip
ftp://ftp.saix.net/pub/simtelnet/win...torinstall.zip
ftp://ftp.sunet.se/pub/simtelnet/win...torinstall.zip
Vers.5.1.4
http://tracker.5star-network.com/dow...17500&siteId=1
Vers. 5.1.64
http://download.minoc.com/zdnet/dlwe...torinstall.zip
Vers. 5.1.645
http://www.brothersoft.com/soft/regnow/mp3doctor-bs.zip
Vers. 5.11.037
ftp://ftp.nctu.edu.tw/Vendors/Softki.../mp3doctor.zip