OK. Took many tries before I found a chain of Macs that could read a 400K disk and write to mobile me. 520c floppy -> HD -> ethernet -> Cube (OS9) -> reboot Cube (OS X) -> Mini -> internet. Things that didn't work included 128K (upgraded) which couldn't AppleTalk with OS 9, Wallstreet whose Finder crashed and trashed the HD when the 400K floppy was inserted in the drive, and a couple of other miscarriages.

So the file along with other early MacPaint files, including several Thunderscan'd images, is here:

https://public.me.com/henryspragens in 68K Mac Software/MacPaintGraphics/japan

I'd forgotten that the first MacPaint didn't have scroll bars on the paint window to move around a large image. We think of scroll bars as always part of the Mac interface.