BDR-XS07UHD - 6x Slot Loading Portable USB 3.1 Gen1(3.0) BD/DVD/CD Burner. Supports 4k Ultra Hd Blu-Ray Playback , BDXL™ And M-Disc™ Format. USB Bus Powered. Cyberlink Software Included | Pioneer Electronics USA
LG GS40N Slot-Load DVD+/-RW Rewritter Dual Layer Optical Drive Slim SA – MITXPC
Configure PC w/ Plextor 16x DVD-RW Dual Layer Slot-Loading (black)
Here's something interesting: a slot-loading 5.25" optical drive made by GoldStar : r/vintagecomputing
USB 3.0 Slot Load DVD Burner Enclosure 9.5mm SATA Internal Optical Drive Casing | eBay
Internal Slot Loading 6X DVD Drive - 661-2538
LG 8x Portable DVD Rewriter with M-DISC™ (GP70NS50) | LG USA
Silverstone SST-SOD04 DVD-RW Slot-loading Slim Optical SATA Drive
computer building - Slot load DVD burner options for standard desktop case - Super User
Amazon.com: Slot Loading Portable External Blu-ray DVD Players, for Windows 10 2-in-1 15 17 Inch Touch Screen Laptop & Desktop Computer, Super Multi Blue-ray Player 8X DVD+-R DL CD-RW Burner Optical Drive
Meet the New 5.25" Optical Drive Standard: Slimmer, Slot-loading
Amazon.com: Internal 6X Blu-ray Burner 12.7mm Slot Loading SATA Optical Drive, for UJ-265 UJ265, BD-RE DL TL QL BDXL 50GB 100GB Blue-ray Disc 8X DVD RW Writer for Dell HP Laptop iMac