[okiedokieiguess]

Hello, I actually work at a sprint service and repair center and we can definitely replace just the speaker. We only order a replacement if it is something we can not repair. As long as the store has hero/evo speakers in stock (they are the same) then they can do the repair in about a half hour.
If they say they have to order a replacement then go to a different store.
The repair is extremely easy, sometimes the associates are just lazy and would rather order a replacement then do the work.