Amazon.com: SHARPAL 145H 10 x 4 Inch Diamond Lapping Plate, Sharpening Stones Flattener, Extra Coarse 220 Grit for Coarse Sharpening and Flattening Stones, Fix & Re-levelling any Whetstone and Sharpening Stones :
Lapping plates/polishing plates for all applications
Shapton Diamond Glass Lapping Plate (DGLP) - Lee Valley Tools
Atoma 600 Grit Japanese Diamond Sharpening Stone / Lapping Plate
Diamond Flattening Stone Lapping Plate Double-sided Extra Large 10x3 inch | eBay
Dia-Flat Lapping Plate - 95 Micron
DMT Dia-Flat Diamond Lapping Plate for Flattening Conventional and Waterstone, 4 by 10 Inch - Sharpening Stones - Amazon.com
Amazon.com: SCOTTCHEN Diamond Flattening Stone Lapping Plate Double-sided Extra Large 10x3 inch (120&180) Grit Diamond Sharpening Plate Fixing Stone Flattener : Tools & Home Improvement