Color Blanks were available at Target. They came with blank white bodies and a set of markers and stickers. My son and I collaborated on these when he was ten. Dr Fate has a sculpted crest and the cape was made from blister card plastic. Spectre and Hourman both have capes made from the same materials. All three were painted with acrylics.
The figures contained in the Custom Showcase are not for sale by Figure Realm, and the creators of the customs are no way affiliated with Figure Realm. The Custom Showcase is purely for entertainment purposes and only provides a means for the creators to show off their work and trade ideas. Figure Realm does not make or sell customs.