I'll expand it and dump it to a floppy. Ooops, none of my Macs have floppy drives.
I realise you've already worked around the problem, by this point, but:
Got an x86 with a floppy drive? Got Linux on it? Install the hfsutils package, and you'll be able to copy the Macbinary-encoded download file onto a Mac-formatted 2MB floppy from there. (There's even a tk/tcl graphical front-end thing for that package.)
More than one way to remove that feline dermal layer.