You may exile tokens you control as part of the materials required. However, because they aren't cards and won't stay in exile, any abilities that refer to what you "used to craft" the back faces won't refer to anything.
Sunbird Standard // Sunbird Effigy
If the materials required include multiple objects, you may exile some of them from among permanents you control and the rest from among cards in your graveyard. You don't have to choose all permanents or all cards from your graveyard.
If a card that isn't a transforming double-faced card becomes a copy of a card with craft, it'll stay in exile if you activate the craft ability. It won't return to the battlefield.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Aldo Domínguez
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
