|"have emailed emachines twice and their answers are nonsense"|
And I'm sure they think your requests are just as nonsensical.
"is buying parts for other computer brands this hard or is it just emachines?'
It's a spring & an LED. These are NOT parts that a PC manufacturer would generally have on hand for resale, especially for a 4-yr old tower that's no longer under warranty. If you needed a new board, CPU, RAM, HDD, etc, I'm sure you'd have no problem getting one from them or another source.
As I see it, you have 3, maybe 4 choices:
1. live with it as-is
2. replace the case
3. go with DAVEINCAPS suggestion & try to find on old tower from somewhere that you can gut for the parts
4. improvise, adapt & overcome