The important points that AMD is missing with their "modify it to fit" response is that:

a) we trust them to supply the best aftermarket sheet metal

Well "best" is relative to what else is out there, so yes, its the best BUT only because the rest is real crap.

b) modifying takes time - either your own or somebody else's.

"time is money". Who wants to pay someone else anywhere from 50 to 100 bucks an hour to modify a part that should fit in the first place !!