Does anyone have a pic dump of the cards they've done so far? Like a google drive dump? I want to know where everyone gets their scans at for the image (especially for the full art ones).
Do you mean the actual card art scans? I personally don't use scans if I can find the art on any side the artists upload to. On DM Wiki there is a list of the artists: https://duelmasters.fandom.com/wiki/Artist. They all have their own page you can view and their known sites are listed there. Most of them have a site (Pixiv, Tumblr, Twitter or DeviantArt) where they upload most of their work. I usually pull the art from there.
If I can't, I just google the card in Japanese and search for the best looking, most usable result and upscale it with Waifu2x (not at all ideal with full-art cards, passable with regular border cards).
As for card borders, I don't use scans. I recreate every border myself, based on pretty much any decent quality scan I can find.
Hope I helped a bit.