Lol, Im not alone in this.
Did same thing by accident. googled for how-to restore the phone. But it did not seem possible to be done. So I sent it to Nokia Care.
Those guys at the Nokia office laughed for a long time, when I told them a story " how I got a new shiny green brick ".
Told me the repairs would take 2 weeks and cost arond $30
Called to Nokia Care. They fixed the phone by changing the celluar module ( maybe with the whole motherboard ).
That means that bootloader can not be fixed, at least for now.