Dualit
Dualit's plastic-lightness is more a byproduct of old-school build quality than a stated mission: the Classic toaster is stainless and cast aluminium with bread touching only bare metal, and it's built to be repaired rather than replaced. Plastic, where it exists, is housing and knobs near the heat, not a food-contact surface - and pop-up toasters are low-stakes for contact anyway. It's a durable, low-plastic-contact choice without pretending to be a plastic-free brand.
How clear are their specs?
The construction is legible - stainless body, cast aluminium ends, bare metal where the bread sits - and the repairable design means the materials are named down to replaceable parts.