How the feck am i supposed to know whats best for someone in another country just by looking at a photograph.
Weld it up = how do i know if he has anyone near thats capable of doing the job, let alone how much they'll charge in hungarian rupees.
Second hand box = how do i know where he can get one and at what price. The price varies depending on year, mileage, condition, availabilty.
New gearbox case = Again, how do i know where to locate one, and have they the right tools for shimming the box ?.