I am currently looking for one like the Vantec, for attaching with 5.25 drives:
www.vantecusa.com
But I was only able to find 3.5 HDD enclosures, SATA/IDE. My question is simple: will these work somehow with Blu-ray/DVD drives? Or even if they work, there's a risk the drive will not fit?
Example:

NexStar DX2 USB 3.0 External Enclosure for SATA Blu-Ray/CD/DVD Drive
Design for 5.25" Blu-Ray/CD/DVD drive Super Speed USB 3.0 transfer rate Plug and Play, No drivers needed Aluminum Alloy Casing for reduced noise and vibration Hot swappable for system equipped with USB port For any System with USB Mass Storage Device Support
But I was only able to find 3.5 HDD enclosures, SATA/IDE. My question is simple: will these work somehow with Blu-ray/DVD drives? Or even if they work, there's a risk the drive will not fit?
Example: