Hit Save! has Plextor disc dumping kits available for community members to borrow.
If you need help, please come chat with us on the VGPC or No-Intro discord servers.
Sega CD and Sega Saturn games can be ripped with the methods in the general disc dumping guide.
The Redump.org team has done a fantastic job documenting dumping GD-ROMs for the Sega Dreamcast and other systems: