I have made a simple online tool to convert a Three.js module from examples/jsm into examples/js. Conversion is done by studying differences and similarities of jsm and js in r147, so it may not work in future release. In any case, in another project of mine I have successfully used converted FontLoader.js, GLTFExporter.js, OrbitControls.js and TextGeometry.js from r148.
The tool is here: https://boytchev.github.io/demoduler/