As much as I would like to help you, sharing copyrighted software without permission is not allowed. But I'll give you a hint; search W__Wo__d for legitimate images.
When I write images of various sizes on modern computers, I typically do a per track format on SAMDisk with a real drive and fdrawcmd.sys installed. You'll need to do
SAMdisk format a: -s8
for a 160k/320k disk format used by DOS 1. Then, write the image like so (If you're writing standard .img files, rename them to .raw):
SAMdisk [filename].raw/td0/etc a: