I think I ran across a Morris Minor myself just a few days ago... I'm pretty sure I have it. Let me look through my stuff and see what I can find. You know how those acquisition quests can be--- the folders are a mess.
I'll let you know.
Okay--- I found it. It's a pretty clean-looking PDF, completely unmarked--- none of the metatags in the pdf are filled out at all. It's almost strange how sterile this thing is.... The bad news is, I think it's only half of what you're hoping for--- it's the pickup version. The back half of it is a cargo bed. From what I can tell, it's an earlier one (going by pictures of real Morris Minors). I don't know where I found it--- but I did get it right around the same time I found the models Zathros mentions above. I would've said I found it at the same place, but it seems different. There really are no markings anywhere in the pdf--- no text at all, except for numbers.
Anyway, if you think it will be useful to you, if you'd like to have it, just let me know.