Adorama offers its VIP Members the Apple Thunderbolt to FireWire Adapter, model no. MD464ZM/A, for $29.99. (Adorama VIP membership is free; click here to sign up.) This $12 mail-in rebate cuts it to $17.99. With free shipping, that's the lowest total price we could find by $11. It allows you to connect a Thunderbolt-equipped Mac to a FireWire device. Rebate expires June 30.