[Q] LG L3 E400 Sim Unlock!?

Does anyone know of a hardware solution to unlock multiple LG L3 E400 handsets? I used to buy IMEI unlock codes from an setools/lgtools user, but they have increased the unlock prices to not be suitable for mass unlocking.

Does anyone know of an offline or hardware method to unlock this handset? Is there a particular box or item that will allow me to achieve this.

Thanks.