Disco

I don’t know if you have any where you live, but sometimes you can find local appliance repair shops that might sell parts. Even if they don’t have a new element hanging around they may have an old usable one to sell you. I used to work at one and we kept ahold of discontinued parts to use for repairs or sale.

You will also want to make sure the filter isn’t clogged up. Most overheating is going to be an airflow issue. You can also look up online how to pull it apart and check components. You may also have a loose power connection somewhere. Make sure the vacuum is unplugged before you mess with it.