The only way to produce .4wt templates from .4w7 documents would be to use the software from which both of these file types originate - 4D Write. Without the native program, it will be impossible to reliably perform this conversion, or rather a standard workflow in 4D Write - making templates.
Convert 4D Write document file to 4D Write template file.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert 4w7 to 4wt on Windows
A sophisticated word processing software
Convert from 4w7 file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.