Well, in my original email to
service.uk@fluke.com
I explained that I would be happy with cosmetically average but otherwise intact parts from a scrapped example, but they sent me straight through to another department which doesn't sell the parts new any more. I suppose they thought (reasonably) that in the first instance I would prefer new parts.
I'll go back to service on the above email and ask them specifically about the scenario you suggest, but if there is a minimum repair charge I think the time charged for would be well in excess of the two minutes it would take to swap a different casing onto it - granted, they would want to fully test it as well.