I don't think you'll be successful in swapping those platters because if I recall correctly all harddisks are sealed in a dust-free environment. I don't think you can emulate such an environment in your own home.
This means that even if the tiniest bit of dust gets onto the platter and gets between the platter and the head it will "scratch" the platter and data will be lost.

It's like you said : I wouldn't risk thrashing your new/used drive to repair this one, especially since your chances of actually repairing it yourself are practically 0.