Here are threads, tapes, knives etc., what Hondo use make flap Cards.
Super Natural Swap Wallet by Hondo
$ 24.95 USD
Mxbon UV Light Cure Cyanoacrylate Adhesive
From $ 9.95 USD
Bicycle Box Face Card
From $ 1.00 USD
Crystal Card Press
$ 20.00 USD
Blank Ace
Super Elastic (200m)
$ 14.95 USD
Pro 3-Way Corner Rounder
Self Healing Cutting Mat- A4
$ 8.95 USD
OLFA Snap-off Utility Knife Long 185B
From $ 8.95 USD