Demosaicing an Unsupported .RAW Format

[Morgan_Hardwood]

How to create synthetic RAW image?

You could create a DNG file using ExifTool and ImageMagick/GraphicsMagick. If you want it mosaiced, I think G’MIC has a filter. http://rawpedia.rawtherapee.com/Film_Simulation#Advanced_-_Identity_DNG

Also, as you’re a for-profit using libre software, consider supporting via donations or hardware.