I don't know how to make .img files but I did make the disk images using .dmg in OS X. If this will work for you PM me your e-mail address and I'll send them along. If you need .img point me to a nice how-to (if there is one) and I'll make those too. The .dmg files work in Mini vMac but I have no idea how they will translate to your system.

If the 68kMLA has a file server I'd be happy to donate these images if they aren't already there. I know Apple hasn't put them on their site yet.