Got this response:
"I haven't a clue where you'd get such a thing - all vector images that I would do would be in Freehand and it would be a huge amount of work
to draw one so v. expensive to buy, I would think. Or maybe he means an architectural (as against illustrative) image made in CAD? [Joe Bloggs] doesn't use that program and I don't know if it would be used in this way but I can ask around. I have used a cutaway isometric image of a house but that was hand-rendered by an architect then scanned. To trace a scanned image is probably what he's trying to avoid doing!"
"I haven't a clue where you'd get such a thing - all vector images that I would do would be in Freehand and it would be a huge amount of work
to draw one so v. expensive to buy, I would think. Or maybe he means an architectural (as against illustrative) image made in CAD? [Joe Bloggs] doesn't use that program and I don't know if it would be used in this way but I can ask around. I have used a cutaway isometric image of a house but that was hand-rendered by an architect then scanned. To trace a scanned image is probably what he's trying to avoid doing!"