Sorry to say, but there really is NO international copyright law. No such thing. The U.S. copyright law gives the holder his lifetime (from the date of issue) plus 70 years.
"International copyright" is "usually" treated the same in the U.S. IF there is a treaty on the books that covers most of the usual commerce laws and regs with the country the author lives in.
What we need to do, is find out what this driver is, and then write a work around type driver. The original writer may {bleep} and scream, but if the code is different, he's out of the picture and the Amiga community can rest easy.
Obviously this isn't a money issue, at this point in time, just some one being a pure PITA.