Hi @rachelkrispies
Here's the [http://h10032.www1.hp.com/ctg/Manual/c05922740.pdf|maintenance and service guide] for the laptop.
Go to p.61 (p.71 of 123 pdf) to view the procedure to remove/replace the fingerprint sensor.
If the fingerprint reader is faulty search online for [https://www.google.com/search?client=firefox-b-d&q=L13681-001|L13681-001] to find suppliers that suit you best.
If the bracket needs replacing, search online for [https://www.google.com/search?client=firefox-b-d&q=L13693-001|L13693-001] This is the part number for the Bracket Kit. The kit includes the USB support bracket and the fingerprint reader bracket.
The touchpad button board removal/replacement procedure as well as the part number for the button board are shown on p.64 (p.74 of 123 pdf) in the guide.