The scheme is in full swing by now. A standard set of goggles is €25, a monoggle is €17.50, both can be made with brass eyeshields for additional €5 or €7.50. Shipping is €5 inside Germany, €7.50 inside Europe, €12.50 worldwide. Special designs can be made for a special price, depending on materials and workload.
Traak will offer my goggles too, but better buy directly, it saves you another profit margin.
Wenn das Brett vor'm Kopfe harzt,
Geh zum Tischler, nicht zum Arzt!