[danielelee]

That diagram is missing a backing plate for brake shoes.
It looks like the hub and studs are attached to the inside of the drum for Elantra, while other cars have them attached to the backing plate and knuckle.

 

[Mesad]

Did you try local junkyard?

 

[Finn1200]

That diagram is missing a backing plate for brake shoes.
It looks like the hub and studs are attached to the inside of the drum for Elantra, while other cars have them attached to the backing plate and knuckle.

That diagram is for the hub, so they don't show the backing plate and shoes, etc for clarity.
That diagram shows the the hub is a seperate piece from the drum. The studs are pressed into the hub and attached to the spindle.

 

[danielelee]

Today I removed the drum and looked it up. Yes, the hub and the studs were attached inside of the drum, but they came off easily after I tapped it a few times with a hammer. The drum was regular drum and it was not a particular one. Many thanks to the members who tried to help me out. I measured the old drum and it still looks O.K. I compared it to the new one I bought from Autozone. The inside diameter was same 8". Maybe I don't need to replace it, but it only needs machining. However, I have decided to use a new one because I don't want any more trouble with the drum brake.
Believe it or not, I have never changed rear brake shoes or drums since I bought the car in 2003. The odometer hit 315,000 miles.
Of course, the inside of the drum looks awful and lining was almost gone, but it didn't squeak.

 

[Finn1200]

Glad it all worked out for you.
You are probably better off replacing the drums.
It's cheap insurance.