.bas-editor

I would like a simple editor for MSX-tokenized .bas-files in Windows or Mac.
I want to exctract a .bas-file from MSX .dsk-files, edit some rows and then put them back in the dsk-file in an easy manor. I know I can do this through emulators but it would be a lot easier to edit in a modern editor where i can scroll freely directly in Windows or Mac.
Anybody know of a good program for this?