Well the replacement case doesnt matter as long as internally it matches with your broken drives innards.
The best i could tell you is, Once you open your current broken drive, on one of the sides, itll have the connectors, kinda like this ( generally speaking )
------------------------ ------------------------------------------
| o o o o o o o o o | | o o o o o o |
------------------------ -------------------------------------------
And these are the connector pins / slots on every drive, now my diagram are for older drives but you get the idea. ALL the drives sides will be solid exept the bottom which has SOME kind of plug in inlet. (kinf odf like above)
The difference being that the connectors could be for older drives, newer sata drives etc.
When you purchase a new drive bay/case/enclosing case, then inside of it, it will have ONE of these
connectors to plug in your new drive.
The only thing you have to do is make sure that its a compatible drive case hence my diagram above.
And thats it.
so in short, open your drive, look at the type of connectors it has, then take to store, and if your not sure, take drive with you and ask what case can you use and thats it lol.
Good luck.