Only Corel PaintShop Pro is capable of creating *.pfr frames from bitmap images like the ones in PNG format. There doesn't seem to be any other alternative for this type of conversion.
Convert Portable Network Graphic to Corel PaintShop Photo Pro frame data.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert png to pfr on Windows
Corel PaintShop Pro is digital photo editor and manager for Microsoft Windows. You can retouch photos, create compositions and share it with other people on Internet. It allows users to edit various RAW image formats and screen recording.
Convert from png file
to pfr file
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.