Your search for "Viper Probe Droid 503" revealed the following:
Cardfight!! Vanguard - VGE-DZ-SS18 - Special Series 18 - Triple Drive Booster D Finale Booster Box (Pre-Order)
Bushiroad
$109.95
Configuration: 3 cards per pack 12 packs per diaplay 18 displays per carton VGE-DZ-SS18 Triple Drive Booster D Finale ...