Asus' ROG Claymore II mechanical keyboard has a handy detachable number pad - The Verge
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Magic Keyboard with Numeric Keypad for Mac models - Apple
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Amazon.com: Magicforce Number Pad, Mechanical USB Wired Numeric Keypad with Blue LED Backlit 21-Key Numpad for Laptop Desktop Computer PC Blue : Electronics
Reposition the number pad with ASUS' Claymore II Wireless Modular Keyboard at $220 (Save $50)
Let's Build: EXT65 (BOX White switches) | Custom 65% Keyboard with Left-hand Numpad - YouTube
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No Numpad? No Problem! How to Get a Numeric Keypad in Windows
KBParadise V20 Black 19-Key Numpad Mechanical Keyboard with Cherry MX Brown, Blue, or Clear switches
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This double-height keyboard puts a numpad above the letters | Engadget
The detachable Numpad of this modular keyboard is the productivity hack you need! - Yanko Design