HDD Caddy for an Asus U43J. I looked on ebay to find a replacement and then thought about just making a slide that can just hold the HDD in place so it doesn't move around. I also used a bit of Neoprene adhesive on the door cover to help cushion it in more.

Fits quite tight.

I also printed with supports but you could probably get away with just bridging

.2 layer height is fine