Whoa, expensive. Just buy a phone off of ebay and take the screen out of it.
I can confirm all the standard size color blackberries that don't have the round power button use the same screen, (never looked inside a new 7520/7290)
Any 72xx or 7510 could be used as a doner.
We keep junker phones around just for screens
Also all the 77xx phones have interchangable screens.