In the document Support Statement for Visual Basic 6.0 on Windows... it states:
Localization Support Binaries
The followi
You should apply SP6. According to this, it covers all English versions of these products, as well as all localized versions.
On the VB6 installation CD those files can be found in the \OS\SYSTEM
folder.
For the OP's given example of MFC42.dll it includes: